Integrate the Windows 8 code into the Chromium tree.

BUG=127799
TEST=A Chromium build can run as the immersive browser on Windows 8.


Review URL: https://chromiumcodereview.appspot.com/10875008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@155429 0039d316-1c4b-4281-b951-d872f2087c98

45 files changed, 6490 insertions, 8 deletions

diff --git a/chrome/chrome_exe.gypi b/chrome/chrome_exe.gypi
index 9909ed4..431d136 100644
--- a/chrome/chrome_exe.gypi
+++ b/chrome/chrome_exe.gypi
@@ -508,7 +508,13 @@
         }],
         ['OS=="win" and component=="shared_library"', {
           'defines': ['COMPILE_CONTENT_STATICALLY'],
-        }]
+        }],
+        ['OS=="win" and (MSVS_VERSION=="2010" or MSVS_VERSION=="2010e")', {
+          'dependencies': [
+            '../win8/metro_driver/metro_driver.gyp:*',
+            '../win8/delegate_execute/delegate_execute.gyp:*',
+          ],
+        }],
       ],
     },
   ],
diff --git a/chrome/installer/mini_installer.gyp b/chrome/installer/mini_installer.gyp
index 49084bc..4b94b89 100644
--- a/chrome/installer/mini_installer.gyp
+++ b/chrome/installer/mini_installer.gyp
@@ -272,13 +272,6 @@
         },
       ],
     }],
-    [ 'mini_installer_internal_deps == 1 or mini_installer_official_deps == 1', {
-      'target_defaults': {
-        'dependencies': [
-          'mini_installer/support/mini_installer_support.gyp:*',
-        ],
-      },
-    }],
     [ 'branding == "Chrome"', {
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
diff --git a/chrome/tools/build/win/check_sdk_patch.py b/chrome/tools/build/win/check_sdk_patch.py
new file mode 100644
index 0000000..9164525
--- /dev/null
+++ b/chrome/tools/build/win/check_sdk_patch.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Script to check that the Windows 8 SDK has been appropriately patched so that
+   it can be used with VS 2010.
+
+   In practice, this checks for the presence of 'enum class' in asyncinfo.h.
+   Changing that to 'enum' is the only thing needed to build with the WinRT
+   headers in VS 2010.
+"""
+
+import os
+import sys
+
+
+def main(argv):
+  if len(argv) < 2:
+    print "Usage: check_sdk_patch.py path_to_windows_8_sdk"
+    return 1
+
+  # Look for asyncinfo.h
+  async_info_path = os.path.join(argv[1], 'Include/winrt/asyncinfo.h')
+  if not os.path.exists(async_info_path):
+    print ("Could not find %s in provided SDK path. Please check input." %
+           async_info_path)
+    print "CWD: %s" % os.getcwd()
+    return 2
+  else:
+    if 'enum class' in open(async_info_path).read():
+      print ("\nERROR: You are using an unpatched Windows 8 SDK. Please see "
+             "instructions at\nhttp://www.chromium.org/developers/how-tos/"
+             "build-instructions-windows\nfor how to apply the patch to build "
+             "with VS2010.\n")
+      return 3
+    else:
+      # Patched Windows 8 SDK found.
+      return 0
+
+
+if '__main__' == __name__:
+  sys.exit(main(sys.argv))
diff --git a/win8/delegate_execute/chrome_util.cc b/win8/delegate_execute/chrome_util.cc
new file mode 100644
index 0000000..701f2e8
--- /dev/null
+++ b/win8/delegate_execute/chrome_util.cc
@@ -0,0 +1,267 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/delegate_execute/chrome_util.h"
+
+#include <atlbase.h>
+#include <shlobj.h>
+#include <windows.h>
+
+#include <algorithm>
+#include <limits>
+#include <string>
+
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/md5.h"
+#include "base/process_util.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "base/win/registry.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/scoped_handle.h"
+#include "base/win/win_util.h"
+#include "google_update/google_update_idl.h"
+
+namespace {
+
+#if defined(GOOGLE_CHROME_BUILD)
+const wchar_t kAppUserModelId[] = L"Chrome";
+#else  // GOOGLE_CHROME_BUILD
+const wchar_t kAppUserModelId[] = L"Chromium";
+#endif  // GOOGLE_CHROME_BUILD
+
+#if defined(GOOGLE_CHROME_BUILD)
+
+// TODO(grt): These constants live in installer_util.  Consider moving them
+// into common_constants to allow for reuse.
+const FilePath::CharType kNewChromeExe[] = FILE_PATH_LITERAL("new_chrome.exe");
+const wchar_t kRenameCommandValue[] = L"cmd";
+const wchar_t kChromeAppGuid[] = L"{8A69D345-D564-463c-AFF1-A69D9E530F96}";
+const wchar_t kRegPathChromeClient[] =
+    L"Software\\Google\\Update\\Clients\\"
+    L"{8A69D345-D564-463c-AFF1-A69D9E530F96}";
+const int kExitCodeRenameSuccessful = 23;
+
+// Returns the name of the global event used to detect if |chrome_exe| is in
+// use by a browser process.
+// TODO(grt): Move this somewhere central so it can be used by both this
+// IsBrowserRunning (below) and IsBrowserAlreadyRunning (browser_util_win.cc).
+string16 GetEventName(const FilePath& chrome_exe) {
+  static wchar_t const kEventPrefix[] = L"Global\\";
+  const size_t prefix_len = arraysize(kEventPrefix) - 1;
+  string16 name;
+  name.reserve(prefix_len + chrome_exe.value().size());
+  name.assign(kEventPrefix, prefix_len);
+  name.append(chrome_exe.value());
+  std::replace(name.begin() + prefix_len, name.end(), '\\', '!');
+  std::transform(name.begin() + prefix_len, name.end(),
+                 name.begin() + prefix_len, tolower);
+  return name;
+}
+
+// Returns true if |chrome_exe| is in use by a browser process. In this case,
+// "in use" means past ChromeBrowserMainParts::PreMainMessageLoopRunImpl.
+bool IsBrowserRunning(const FilePath& chrome_exe) {
+  base::win::ScopedHandle handle(::OpenEvent(
+      SYNCHRONIZE, FALSE, GetEventName(chrome_exe).c_str()));
+  if (handle.IsValid())
+    return true;
+  DWORD last_error = ::GetLastError();
+  if (last_error != ERROR_FILE_NOT_FOUND) {
+    AtlTrace("%hs. Failed to open browser event; error %u.\n", __FUNCTION__,
+             last_error);
+  }
+  return false;
+}
+
+// Returns true if the file new_chrome.exe exists in the same directory as
+// |chrome_exe|.
+bool NewChromeExeExists(const FilePath& chrome_exe) {
+  FilePath new_chrome_exe(chrome_exe.DirName().Append(kNewChromeExe));
+  return file_util::PathExists(new_chrome_exe);
+}
+
+bool GetUpdateCommand(bool is_per_user, string16* update_command) {
+  const HKEY root = is_per_user ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE;
+  base::win::RegKey key(root, kRegPathChromeClient, KEY_QUERY_VALUE);
+
+  return key.ReadValue(kRenameCommandValue, update_command) == ERROR_SUCCESS;
+}
+
+#endif  // GOOGLE_CHROME_BUILD
+
+// TODO(grt): This code also lives in installer_util.  Refactor for reuse.
+bool IsPerUserInstall(const FilePath& chrome_exe) {
+  wchar_t program_files_path[MAX_PATH] = {0};
+  if (SUCCEEDED(SHGetFolderPath(NULL, CSIDL_PROGRAM_FILES, NULL,
+                                SHGFP_TYPE_CURRENT, program_files_path))) {
+    return !StartsWith(chrome_exe.value().c_str(), program_files_path, false);
+  } else {
+    NOTREACHED();
+  }
+  return true;
+}
+
+// TODO(gab): This code also lives in shell_util. Refactor for reuse.
+string16 ByteArrayToBase32(const uint8* bytes, size_t size) {
+  static const char kEncoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+
+  // Eliminate special cases first.
+  if (size == 0) {
+    return string16();
+  } else if (size == 1) {
+    string16 ret;
+    ret.push_back(kEncoding[(bytes[0] & 0xf8) >> 3]);
+    ret.push_back(kEncoding[(bytes[0] & 0x07) << 2]);
+    return ret;
+  } else if (size >= std::numeric_limits<size_t>::max() / 8) {
+    // If |size| is too big, the calculation of |encoded_length| below will
+    // overflow.
+    AtlTrace("%hs. Byte array is too long.\n", __FUNCTION__);
+    return string16();
+  }
+
+  // Overestimate the number of bits in the string by 4 so that dividing by 5
+  // is the equivalent of rounding up the actual number of bits divided by 5.
+  const size_t encoded_length = (size * 8 + 4) / 5;
+
+  string16 ret;
+  ret.reserve(encoded_length);
+
+  // A bit stream which will be read from the left and appended to from the
+  // right as it's emptied.
+  uint16 bit_stream = (bytes[0] << 8) + bytes[1];
+  size_t next_byte_index = 2;
+  int free_bits = 0;
+  while (free_bits < 16) {
+    // Extract the 5 leftmost bits in the stream
+    ret.push_back(kEncoding[(bit_stream & 0xf800) >> 11]);
+    bit_stream <<= 5;
+    free_bits += 5;
+
+    // If there is enough room in the bit stream, inject another byte (if there
+    // are any left...).
+    if (free_bits >= 8 && next_byte_index < size) {
+      free_bits -= 8;
+      bit_stream += bytes[next_byte_index++] << free_bits;
+    }
+  }
+
+  if (ret.length() != encoded_length) {
+    AtlTrace("%hs. Encoding doesn't match expected length.\n", __FUNCTION__);
+    return string16();
+  }
+  return ret;
+}
+
+// TODO(gab): This code also lives in shell_util. Refactor for reuse.
+bool GetUserSpecificRegistrySuffix(string16* suffix) {
+  string16 user_sid;
+  if (!base::win::GetUserSidString(&user_sid)) {
+    AtlTrace("%hs. GetUserSidString failed.\n", __FUNCTION__);
+    return false;
+  }
+  COMPILE_ASSERT(sizeof(base::MD5Digest) == 16, size_of_MD5_not_as_expected_);
+  base::MD5Digest md5_digest;
+  std::string user_sid_ascii(UTF16ToASCII(user_sid));
+  base::MD5Sum(user_sid_ascii.c_str(), user_sid_ascii.length(), &md5_digest);
+  const string16 base32_md5(
+      ByteArrayToBase32(md5_digest.a, arraysize(md5_digest.a)));
+  // The value returned by the base32 algorithm above must never change and must
+  // always be 26 characters long (i.e. if someone ever moves this to base and
+  // implements the full base32 algorithm (i.e. with appended '=' signs in the
+  // output), they must provide a flag to allow this method to still request
+  // the output with no appended '=' signs).
+  if (base32_md5.length() != 26U) {
+    AtlTrace("%hs. Base32 encoding of md5 hash is incorrect.\n", __FUNCTION__);
+    return false;
+  }
+  suffix->reserve(base32_md5.length() + 1);
+  suffix->assign(1, L'.');
+  suffix->append(base32_md5);
+  return true;
+}
+
+}  // namespace
+
+namespace delegate_execute {
+
+void UpdateChromeIfNeeded(const FilePath& chrome_exe) {
+#if defined(GOOGLE_CHROME_BUILD)
+  // Nothing to do if a browser is already running or if there's no
+  // new_chrome.exe.
+  if (IsBrowserRunning(chrome_exe) || !NewChromeExeExists(chrome_exe))
+    return;
+
+  base::ProcessHandle process_handle = base::kNullProcessHandle;
+
+  if (IsPerUserInstall(chrome_exe)) {
+    // Read the update command from the registry.
+    string16 update_command;
+    if (!GetUpdateCommand(true, &update_command)) {
+      AtlTrace("%hs. Failed to read update command from registry.\n",
+               __FUNCTION__);
+    } else {
+      // Run the update command.
+      base::LaunchOptions launch_options;
+      launch_options.start_hidden = true;
+      if (!base::LaunchProcess(update_command, launch_options,
+                               &process_handle)) {
+        AtlTrace("%hs. Failed to launch command to finalize update; "
+                 "error %u.\n", __FUNCTION__, ::GetLastError());
+        process_handle = base::kNullProcessHandle;
+      }
+    }
+  } else {
+    // Run the update command via Google Update.
+    HRESULT hr = S_OK;
+    base::win::ScopedComPtr<IProcessLauncher> process_launcher;
+    hr = process_launcher.CreateInstance(__uuidof(ProcessLauncherClass));
+    if (FAILED(hr)) {
+      AtlTrace("%hs. Failed to Create ProcessLauncher; hr=0x%X.\n",
+               __FUNCTION__, hr);
+    } else {
+      ULONG_PTR handle = 0;
+      hr = process_launcher->LaunchCmdElevated(
+          kChromeAppGuid, kRenameCommandValue, GetCurrentProcessId(), &handle);
+      if (FAILED(hr)) {
+        AtlTrace("%hs. Failed to launch command to finalize update; "
+                 "hr=0x%X.\n", __FUNCTION__, hr);
+      } else {
+        process_handle = reinterpret_cast<base::ProcessHandle>(handle);
+      }
+    }
+  }
+
+  // Wait for the update to complete and report the results.
+  if (process_handle != base::kNullProcessHandle) {
+    int exit_code = 0;
+    // WaitForExitCode will close the handle in all cases.
+    if (!base::WaitForExitCode(process_handle, &exit_code)) {
+      AtlTrace("%hs. Failed to get result when finalizing update.\n",
+               __FUNCTION__);
+    } else if (exit_code != kExitCodeRenameSuccessful) {
+      AtlTrace("%hs. Failed to finalize update with exit code %d.\n",
+               __FUNCTION__, exit_code);
+    } else {
+      AtlTrace("%hs. Finalized pending update.\n", __FUNCTION__);
+    }
+  }
+#endif
+}
+
+// TODO(gab): This code also lives in shell_util. Refactor for reuse.
+string16 GetAppId(const FilePath& chrome_exe) {
+  string16 app_id(kAppUserModelId);
+  string16 suffix;
+  if (IsPerUserInstall(chrome_exe) &&
+      !GetUserSpecificRegistrySuffix(&suffix)) {
+    AtlTrace("%hs. GetUserSpecificRegistrySuffix failed.\n",
+              __FUNCTION__);
+  }
+  return app_id.append(suffix);
+}
+
+}  // delegate_execute
diff --git a/win8/delegate_execute/chrome_util.h b/win8/delegate_execute/chrome_util.h
new file mode 100644
index 0000000..634ce6c
--- /dev/null
+++ b/win8/delegate_execute/chrome_util.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WIN8_DELEGATE_EXECUTE_CHROME_UTIL_H_
+#define WIN8_DELEGATE_EXECUTE_CHROME_UTIL_H_
+
+#include "base/string16.h"
+
+class FilePath;
+
+namespace delegate_execute {
+
+// Finalizes a previously updated installation.
+void UpdateChromeIfNeeded(const FilePath& chrome_exe);
+
+// Returns the appid of the Chrome pointed to by |chrome_exe|.
+string16 GetAppId(const FilePath& chrome_exe);
+
+}  // namespace delegate_execute
+
+#endif  // WIN8_DELEGATE_EXECUTE_CHROME_UTIL_H_
diff --git a/win8/delegate_execute/command_execute_impl.cc b/win8/delegate_execute/command_execute_impl.cc
new file mode 100644
index 0000000..ef1378a
--- /dev/null
+++ b/win8/delegate_execute/command_execute_impl.cc
@@ -0,0 +1,440 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Implementation of the CommandExecuteImpl class which implements the
+// IExecuteCommand and related interfaces for handling ShellExecute based
+// launches of the Chrome browser.
+
+#include "win8/delegate_execute/command_execute_impl.h"
+
+#include "base/file_util.h"
+#include "base/path_service.h"
+#include "base/utf_string_conversions.h"
+#include "base/win/scoped_co_mem.h"
+#include "base/win/scoped_handle.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/common/chrome_switches.h"
+#include "win8/delegate_execute/chrome_util.h"
+
+// CommandExecuteImpl is resposible for activating chrome in Windows 8. The
+// flow is complicated and this tries to highlight the important events.
+// The current approach is to have a single instance of chrome either
+// running in desktop or metro mode. If there is no current instance then
+// the desktop shortcut launches desktop chrome and the metro tile or search
+// charm launches metro chrome.
+// If chrome is running then focus/activation is given to the existing one
+// regarless of what launch point the user used.
+//
+// The general flow when chrome is the default browser is as follows:
+//
+// 1- User interacts with launch point (icon, tile, search, shellexec, etc)
+// 2- Windows finds the appid for launch item and resolves it to chrome
+// 3- Windows activates CommandExecuteImpl inside a surrogate process
+// 4- Windows calls the following sequence of entry points:
+//    CommandExecuteImpl::SetShowWindow
+//    CommandExecuteImpl::SetPosition
+//    CommandExecuteImpl::SetDirectory
+//    CommandExecuteImpl::SetParameter
+//    CommandExecuteImpl::SetNoShowUI
+//    CommandExecuteImpl::SetSelection
+//    CommandExecuteImpl::Initialize
+//    Up to this point the code basically just gathers values passed in, like
+//    the launch scheme (or url) and the activation verb.
+// 5- Windows calls CommandExecuteImpl::Getvalue()
+//    Here we need to return AHE_IMMERSIVE or AHE_DESKTOP. That depends on:
+//    a) if run in high-integrity return AHE_DESKTOP
+//    b) if chrome is running return the AHE_ mode of chrome
+//    c) if the current process is inmmersive return AHE_IMMERSIVE
+//    d) if the protocol is file and IExecuteCommandHost::GetUIMode() is not
+//       ECHUIM_DESKTOP then return AHE_IMMERSIVE
+//    e) if none of the above return AHE_DESKTOP
+// 6- If we returned AHE_DESKTOP in step 5 then CommandExecuteImpl::Execute()
+//    is called, here we call GetLaunchMode() which:
+//    a) if chrome is running return the mode of chrome or
+//    b) return IExecuteCommandHost::GetUIMode()
+// 7- If GetLaunchMode() returns
+//    a) ECHUIM_DESKTOP we call LaunchDestopChrome() that calls ::CreateProcess
+//    b) else we call one of the IApplicationActivationManager activation
+//       functions depending on the parameters passed in step 4.
+//
+//  Some examples will help clarify the common cases.
+//
+//  I - No chrome running, taskbar icon launch:
+//      a) Scheme is 'file', Verb is 'open'
+//      b) GetValue() returns at e) step : AHE_DESKTOP
+//      c) Execute() calls LaunchDestopChrome()
+//      --> desktop chrome runs
+//  II- No chrome running, tile activation launch:
+//      a) Scheme is 'file', Verb is 'open'
+//      b) GetValue() returns at d) step : AHE_IMMERSIVE
+//      c) Windows does not call us back and just activates chrome
+//      --> metro chrome runs
+//  III- No chrome running, url link click on metro app:
+//      a) Scheme is 'http', Verb is 'open'
+//      b) Getvalue() returns at e) step : AHE_DESKTOP
+//      c) Execute() calls IApplicationActivationManager::ActivateForProtocol
+//      --> metro chrome runs
+//
+CommandExecuteImpl::CommandExecuteImpl()
+    : integrity_level_(base::INTEGRITY_UNKNOWN),
+      launch_scheme_(INTERNET_SCHEME_DEFAULT),
+      chrome_mode_(ECHUIM_SYSTEM_LAUNCHER) {
+  memset(&start_info_, 0, sizeof(start_info_));
+  start_info_.cb = sizeof(start_info_);
+  // We need to query the user data dir of chrome so we need chrome's
+  // path provider.
+  chrome::RegisterPathProvider();
+}
+
+// CommandExecuteImpl
+STDMETHODIMP CommandExecuteImpl::SetKeyState(DWORD key_state) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetParameters(LPCWSTR params) {
+  AtlTrace("In %hs [%S]\n", __FUNCTION__, params);
+  if (params) {
+    parameters_ = params;
+  }
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetPosition(POINT pt) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetShowWindow(int show) {
+  AtlTrace("In %hs  show=%d\n", __FUNCTION__, show);
+  start_info_.wShowWindow = show;
+  start_info_.dwFlags |= STARTF_USESHOWWINDOW;
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetNoShowUI(BOOL no_show_ui) {
+  AtlTrace("In %hs no_show=%d\n", __FUNCTION__, no_show_ui);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetDirectory(LPCWSTR directory) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::GetValue(enum AHE_TYPE* pahe) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+
+  if (!GetLaunchScheme(&display_name_, &launch_scheme_)) {
+    AtlTrace("Failed to get scheme, E_FAIL\n");
+    return E_FAIL;
+  }
+
+  if (integrity_level_ == base::HIGH_INTEGRITY) {
+    // Metro mode apps don't work in high integrity mode.
+    AtlTrace("High integrity, AHE_DESKTOP\n");
+    *pahe = AHE_DESKTOP;
+    return S_OK;
+  }
+
+  FilePath user_data_dir;
+  if (!PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))  {
+    AtlTrace("Failed to get chrome's data dir path, E_FAIL\n");
+    return E_FAIL;
+  }
+
+  HWND chrome_window = ::FindWindowEx(HWND_MESSAGE, NULL,
+                                      chrome::kMessageWindowClass,
+                                      user_data_dir.value().c_str());
+  if (chrome_window) {
+    AtlTrace("Found chrome window %p\n", chrome_window);
+    // The failure cases below are deemed to happen due to the inherently racy
+    // procedure of going from chrome's window to process handle during which
+    // chrome might have exited. Failing here would probably just cause the
+    // user to retry at which point we would do the right thing.
+    DWORD chrome_pid = 0;
+    ::GetWindowThreadProcessId(chrome_window, &chrome_pid);
+    if (!chrome_pid) {
+      AtlTrace("Failed to get chrome's PID, E_FAIL\n");
+      return E_FAIL;
+    }
+    base::win::ScopedHandle process(
+        ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, chrome_pid));
+    if (!process.IsValid()) {
+      AtlTrace("Failed to open chrome's process [%d], E_FAIL\n", chrome_pid);
+      return E_FAIL;
+    }
+    if (IsImmersiveProcess(process.Get())) {
+      AtlTrace("Chrome [%d] is inmmersive, AHE_IMMERSIVE\n", chrome_pid);
+      chrome_mode_ = ECHUIM_IMMERSIVE;
+      *pahe = AHE_IMMERSIVE;
+    } else {
+      AtlTrace("Chrome [%d] is Desktop, AHE_DESKTOP\n");
+      chrome_mode_ = ECHUIM_DESKTOP;
+      *pahe = AHE_DESKTOP;
+    }
+    return S_OK;
+  }
+
+  if (IsImmersiveProcess(GetCurrentProcess())) {
+    AtlTrace("Current process is inmmersive, AHE_IMMERSIVE\n");
+    *pahe = AHE_IMMERSIVE;
+    return S_OK;
+  }
+
+  if ((launch_scheme_ == INTERNET_SCHEME_FILE) &&
+      (GetLaunchMode() != ECHUIM_DESKTOP)) {
+    AtlTrace("INTERNET_SCHEME_FILE, mode != ECHUIM_DESKTOP, AHE_IMMERSIVE\n");
+    *pahe = AHE_IMMERSIVE;
+    return S_OK;
+  }
+
+  AtlTrace("Fallback is AHE_DESKTOP\n");
+  *pahe = AHE_DESKTOP;
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::Execute() {
+  AtlTrace("In %hs\n", __FUNCTION__);
+
+  if (integrity_level_ == base::HIGH_INTEGRITY)
+    return LaunchDesktopChrome();
+
+  EC_HOST_UI_MODE mode = GetLaunchMode();
+  if (mode == ECHUIM_DESKTOP)
+    return LaunchDesktopChrome();
+
+  HRESULT hr = E_FAIL;
+  CComPtr<IApplicationActivationManager> activation_manager;
+  hr = activation_manager.CoCreateInstance(CLSID_ApplicationActivationManager);
+  if (!activation_manager) {
+    AtlTrace("Failed to get the activation manager, error 0x%x\n", hr);
+    return S_OK;
+  }
+
+  string16 app_id = delegate_execute::GetAppId(chrome_exe_);
+
+  DWORD pid = 0;
+  if (launch_scheme_ == INTERNET_SCHEME_FILE) {
+    AtlTrace("Activating for file\n");
+    hr = activation_manager->ActivateApplication(app_id.c_str(),
+                                                 verb_.c_str(),
+                                                 AO_NOERRORUI,
+                                                 &pid);
+  } else {
+    AtlTrace("Activating for protocol\n");
+    hr = activation_manager->ActivateForProtocol(app_id.c_str(),
+                                                 item_array_,
+                                                 &pid);
+  }
+  if (hr == E_APPLICATION_NOT_REGISTERED) {
+    AtlTrace("Metro chrome is not registered, launching in desktop\n");
+    return LaunchDesktopChrome();
+  }
+  AtlTrace("Metro Chrome launch, pid=%d, returned 0x%x\n", pid, hr);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::Initialize(LPCWSTR name,
+                                            IPropertyBag* bag) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  if (!FindChromeExe(&chrome_exe_))
+    return E_FAIL;
+  delegate_execute::UpdateChromeIfNeeded(chrome_exe_);
+  if (name) {
+    AtlTrace("Verb is %S\n", name);
+    verb_ = name;
+  }
+
+  base::GetProcessIntegrityLevel(base::GetCurrentProcessHandle(),
+                                 &integrity_level_);
+  if (integrity_level_ == base::HIGH_INTEGRITY) {
+    AtlTrace("Delegate execute launched in high integrity level\n");
+  }
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::SetSelection(IShellItemArray* item_array) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  item_array_ = item_array;
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::GetSelection(REFIID riid, void** selection) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  return S_OK;
+}
+
+STDMETHODIMP CommandExecuteImpl::AllowForegroundTransfer(void* reserved) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  return S_OK;
+}
+
+// Returns false if chrome.exe cannot be found.
+// static
+bool CommandExecuteImpl::FindChromeExe(FilePath* chrome_exe) {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  // Look for chrome.exe one folder above delegate_execute.exe (as expected in
+  // Chrome installs). Failing that, look for it alonside delegate_execute.exe.
+  FilePath dir_exe;
+  if (!PathService::Get(base::DIR_EXE, &dir_exe)) {
+    AtlTrace("Failed to get current exe path\n");
+    return false;
+  }
+
+  *chrome_exe = dir_exe.DirName().Append(chrome::kBrowserProcessExecutableName);
+  if (!file_util::PathExists(*chrome_exe)) {
+    *chrome_exe = dir_exe.Append(chrome::kBrowserProcessExecutableName);
+    if (!file_util::PathExists(*chrome_exe)) {
+      AtlTrace("Failed to find chrome exe file\n");
+      return false;
+    }
+  }
+
+  AtlTrace("Got chrome exe path as %ls\n", chrome_exe->value().c_str());
+  return true;
+}
+
+bool CommandExecuteImpl::GetLaunchScheme(
+    string16* display_name, INTERNET_SCHEME* scheme) {
+  if (!item_array_)
+    return false;
+
+  ATLASSERT(display_name);
+  ATLASSERT(scheme);
+
+  DWORD count = 0;
+  item_array_->GetCount(&count);
+
+  if (count != 1) {
+    AtlTrace("Cannot handle %d elements in the IShellItemArray\n", count);
+    return false;
+  }
+
+  CComPtr<IEnumShellItems> items;
+  item_array_->EnumItems(&items);
+  CComPtr<IShellItem> shell_item;
+  HRESULT hr = items->Next(1, &shell_item, &count);
+  if (hr != S_OK) {
+    AtlTrace("Failed to read element from the IShellItemsArray\n");
+    return false;
+  }
+
+  base::win::ScopedCoMem<wchar_t> name;
+  hr = shell_item->GetDisplayName(SIGDN_URL, &name);
+  if (hr != S_OK) {
+    AtlTrace("Failed to get display name\n");
+    return false;
+  }
+
+  AtlTrace("Display name is [%ls]\n", name);
+
+  wchar_t scheme_name[16];
+  URL_COMPONENTS components = {0};
+  components.lpszScheme = scheme_name;
+  components.dwSchemeLength = sizeof(scheme_name)/sizeof(scheme_name[0]);
+
+  components.dwStructSize = sizeof(components);
+  if (!InternetCrackUrlW(name, 0, 0, &components)) {
+    AtlTrace("Failed to crack url %ls\n", name);
+    return false;
+  }
+
+  AtlTrace("Launch scheme is [%ls] (%d)\n", scheme_name, components.nScheme);
+  *display_name = name;
+  *scheme = components.nScheme;
+  return true;
+}
+
+HRESULT CommandExecuteImpl::LaunchDesktopChrome() {
+  AtlTrace("In %hs\n", __FUNCTION__);
+  string16 display_name = display_name_;
+
+  switch (launch_scheme_) {
+    case INTERNET_SCHEME_FILE:
+      // If anything other than chrome.exe is passed in the display name we
+      // should honor it. For e.g. If the user clicks on a html file when
+      // chrome is the default we should treat it as a parameter to be passed
+      // to chrome.
+      if (display_name.find(L"chrome.exe") != string16::npos)
+        display_name.clear();
+      break;
+
+    default:
+      break;
+  }
+
+  string16 command_line = L"\"";
+  command_line += chrome_exe_.value();
+  command_line += L"\"";
+
+  if (!parameters_.empty()) {
+    AtlTrace("Adding parameters %ls to command line\n", parameters_.c_str());
+    command_line += L" ";
+    command_line += parameters_.c_str();
+  }
+
+  if (!display_name.empty()) {
+    command_line += L" -- ";
+    command_line += display_name;
+  }
+
+  AtlTrace("Formatted command line is %ls\n", command_line.c_str());
+
+  PROCESS_INFORMATION proc_info = {0};
+  BOOL ret = CreateProcess(NULL, const_cast<LPWSTR>(command_line.c_str()),
+                           NULL, NULL, FALSE, 0, NULL, NULL, &start_info_,
+                           &proc_info);
+  if (ret) {
+    AtlTrace("Process id is %d\n", proc_info.dwProcessId);
+    CloseHandle(proc_info.hProcess);
+    CloseHandle(proc_info.hThread);
+  } else {
+    AtlTrace("Process launch failed, error %d\n", ::GetLastError());
+  }
+
+  return S_OK;
+}
+
+EC_HOST_UI_MODE CommandExecuteImpl::GetLaunchMode() {
+  // We are to return chrome's mode if chrome exists else we query our embedder
+  // IServiceProvider and learn the mode from them.
+  static bool launch_mode_determined = false;
+  static EC_HOST_UI_MODE launch_mode = ECHUIM_DESKTOP;
+
+  const char* modes[] = { "Desktop", "Inmmersive", "SysLauncher", "??" };
+
+  if (launch_mode_determined)
+    return launch_mode;
+
+  if (chrome_mode_ != ECHUIM_SYSTEM_LAUNCHER) {
+    launch_mode = chrome_mode_;
+    AtlTrace("Launch mode is that of chrome, %s\n", modes[launch_mode]);
+    launch_mode_determined = true;
+    return launch_mode;
+  }
+
+  if (parameters_ == ASCIIToWide(switches::kForceImmersive)) {
+    launch_mode = ECHUIM_IMMERSIVE;
+    AtlTrace("Launch mode forced to %s\n", modes[launch_mode]);
+    launch_mode_determined = true;
+    return launch_mode;
+  }
+
+  CComPtr<IExecuteCommandHost> host;
+  CComQIPtr<IServiceProvider> service_provider = m_spUnkSite;
+  if (service_provider) {
+    service_provider->QueryService(IID_IExecuteCommandHost, &host);
+    if (host) {
+      host->GetUIMode(&launch_mode);
+    } else {
+      AtlTrace("Failed to get IID_IExecuteCommandHost. Assuming desktop\n");
+    }
+  } else {
+      AtlTrace("Failed to get IServiceProvider. Assuming desktop mode\n");
+  }
+  AtlTrace("Launch mode is %s\n", modes[launch_mode]);
+  launch_mode_determined = true;
+  return launch_mode;
+}
diff --git a/win8/delegate_execute/command_execute_impl.h b/win8/delegate_execute/command_execute_impl.h
new file mode 100644
index 0000000..5a1a95c
--- /dev/null
+++ b/win8/delegate_execute/command_execute_impl.h
@@ -0,0 +1,105 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <atlbase.h>
+#include <atlcom.h>
+#include <atlctl.h>
+#include <ShObjIdl.h>
+#include <WinInet.h>
+
+#include <string>
+
+#include "base/file_path.h"
+#include "base/process_util.h"
+#include "win8/delegate_execute/resource.h"       // main symbols
+
+using namespace ATL;
+
+EXTERN_C const GUID CLSID_CommandExecuteImpl;
+
+// CommandExecuteImpl
+// This class implements the IExecuteCommand and related interfaces for
+// handling ShellExecute launches of the Chrome browser, i.e. whether to
+// launch Chrome in metro mode or desktop mode.
+#if defined(GOOGLE_CHROME_BUILD)
+class ATL_NO_VTABLE DECLSPEC_UUID("5C65F4B0-3651-4514-B207-D10CB699B14B")
+    CommandExecuteImpl
+#else  // GOOGLE_CHROME_BUILD
+class ATL_NO_VTABLE DECLSPEC_UUID("A2DF06F9-A21A-44A8-8A99-8B9C84F29160")
+    CommandExecuteImpl
+#endif  // GOOGLE_CHROME_BUILD
+    : public CComObjectRootEx<CComSingleThreadModel>,
+      public CComCoClass<CommandExecuteImpl, &CLSID_CommandExecuteImpl>,
+      public IExecuteCommand,
+      public IObjectWithSiteImpl<CommandExecuteImpl>,
+      public IInitializeCommand,
+      public IObjectWithSelection,
+      public IExecuteCommandApplicationHostEnvironment,
+      public IForegroundTransfer {
+ public:
+  CommandExecuteImpl();
+
+  DECLARE_REGISTRY_RESOURCEID(IDR_COMMANDEXECUTEIMPL)
+
+  BEGIN_COM_MAP(CommandExecuteImpl)
+    COM_INTERFACE_ENTRY(IExecuteCommand)
+    COM_INTERFACE_ENTRY(IObjectWithSite)
+    COM_INTERFACE_ENTRY(IInitializeCommand)
+    COM_INTERFACE_ENTRY(IObjectWithSelection)
+    COM_INTERFACE_ENTRY(IExecuteCommandApplicationHostEnvironment)
+    COM_INTERFACE_ENTRY(IForegroundTransfer)
+  END_COM_MAP()
+
+  DECLARE_PROTECT_FINAL_CONSTRUCT()
+
+  HRESULT FinalConstruct() {
+    return S_OK;
+  }
+
+  void FinalRelease() {
+  }
+
+ public:
+  // IExecuteCommand
+  STDMETHOD(SetKeyState)(DWORD key_state);
+  STDMETHOD(SetParameters)(LPCWSTR params);
+  STDMETHOD(SetPosition)(POINT pt);
+  STDMETHOD(SetShowWindow)(int show);
+  STDMETHOD(SetNoShowUI)(BOOL no_show_ui);
+  STDMETHOD(SetDirectory)(LPCWSTR directory);
+  STDMETHOD(Execute)(void);
+
+  // IInitializeCommand
+  STDMETHOD(Initialize)(LPCWSTR name, IPropertyBag* bag);
+
+  // IObjectWithSelection
+  STDMETHOD(SetSelection)(IShellItemArray* item_array);
+  STDMETHOD(GetSelection)(REFIID riid, void** selection);
+
+  // IExecuteCommandApplicationHostEnvironment
+  STDMETHOD(GetValue)(enum AHE_TYPE* pahe);
+
+  // IForegroundTransfer
+  STDMETHOD(AllowForegroundTransfer)(void* reserved);
+
+ private:
+  static bool FindChromeExe(FilePath* chrome_exe);
+  bool GetLaunchScheme(string16* display_name, INTERNET_SCHEME* scheme);
+  HRESULT LaunchDesktopChrome();
+  // Returns the launch mode, i.e. desktop launch/metro launch, etc.
+  EC_HOST_UI_MODE GetLaunchMode();
+
+  CComPtr<IShellItemArray> item_array_;
+  string16 parameters_;
+  FilePath chrome_exe_;
+  STARTUPINFO start_info_;
+  string16 verb_;
+  string16 display_name_;
+  INTERNET_SCHEME launch_scheme_;
+
+  base::IntegrityLevel integrity_level_;
+  EC_HOST_UI_MODE chrome_mode_;
+};
+
+OBJECT_ENTRY_AUTO(__uuidof(CommandExecuteImpl), CommandExecuteImpl)
diff --git a/win8/delegate_execute/command_execute_impl.rgs b/win8/delegate_execute/command_execute_impl.rgs
new file mode 100644
index 0000000..4f1aba3
--- /dev/null
+++ b/win8/delegate_execute/command_execute_impl.rgs
@@ -0,0 +1,10 @@
+HKCR {
+  NoRemove CLSID {
+    ForceRemove '%DELEGATE_EXECUTE_CLSID%' = s 'CommandExecuteImpl Class' {
+      ForceRemove Programmable
+        LocalServer32 = s '%MODULE%' {
+          val ServerExecutable = s '%MODULE_RAW%'
+        }
+    }
+  }
+}
diff --git a/win8/delegate_execute/delegate_execute.cc b/win8/delegate_execute/delegate_execute.cc
new file mode 100644
index 0000000..9f3430c
--- /dev/null
+++ b/win8/delegate_execute/delegate_execute.cc
@@ -0,0 +1,120 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <atlbase.h>
+#include <atlcom.h>
+#include <atlctl.h>
+#include <initguid.h>
+#include <shellapi.h>
+
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/file_util.h"
+#include "base/string16.h"
+#include "base/string_number_conversions.h"
+#include "base/utf_string_conversions.h"
+#include "base/win/scoped_com_initializer.h"
+#include "base/win/scoped_handle.h"
+#include "chrome/common/chrome_switches.h"
+#include "command_execute_impl.h"
+#include "win8/delegate_execute/delegate_execute_operation.h"
+#include "win8/delegate_execute/resource.h"
+
+using namespace ATL;
+
+class DelegateExecuteModule
+    : public ATL::CAtlExeModuleT< DelegateExecuteModule > {
+ public :
+  typedef ATL::CAtlExeModuleT<DelegateExecuteModule> ParentClass;
+
+  DECLARE_REGISTRY_APPID_RESOURCEID(IDR_DELEGATEEXECUTE,
+                                    "{B1935DA1-112F-479A-975B-AB8588ABA636}")
+
+  virtual HRESULT AddCommonRGSReplacements(IRegistrarBase* registrar) throw() {
+    AtlTrace(L"In %hs\n", __FUNCTION__);
+    HRESULT hr = ParentClass::AddCommonRGSReplacements(registrar);
+    if (FAILED(hr))
+      return hr;
+
+    wchar_t delegate_execute_clsid[MAX_PATH] = {0};
+    if (!StringFromGUID2(__uuidof(CommandExecuteImpl), delegate_execute_clsid,
+                         ARRAYSIZE(delegate_execute_clsid))) {
+      ATLASSERT(false);
+      return E_FAIL;
+    }
+
+    hr = registrar->AddReplacement(L"DELEGATE_EXECUTE_CLSID",
+                                   delegate_execute_clsid);
+    ATLASSERT(SUCCEEDED(hr));
+    return hr;
+  }
+};
+
+DelegateExecuteModule _AtlModule;
+
+// Relaunch metro Chrome by ShellExecute on |shortcut| with --force-immersive.
+// |handle_value| is an optional handle on which this function will wait before
+// performing the relaunch.
+int RelaunchChrome(const FilePath& shortcut, const string16& handle_value) {
+  base::win::ScopedHandle handle;
+
+  if (!handle_value.empty()) {
+    uint32 the_handle = 0;
+    if (!base::StringToUint(handle_value, &the_handle)) {
+      // Failed to parse the handle value.  Skip the wait but proceed with the
+      // relaunch.
+      AtlTrace(L"Failed to parse handle value %ls\n", handle_value.c_str());
+    } else {
+      handle.Set(reinterpret_cast<HANDLE>(the_handle));
+    }
+  }
+
+  if (handle.IsValid()) {
+    AtlTrace(L"Waiting for chrome.exe to exit.\n");
+    DWORD result = ::WaitForSingleObject(handle, 10 * 1000);
+    AtlTrace(L"And we're back.\n");
+    if (result != WAIT_OBJECT_0) {
+      AtlTrace(L"Failed to wait for parent to exit; result=%u.\n", result);
+      // This could mean that Chrome has hung.  Conservatively proceed with
+      // the relaunch anyway.
+    }
+    handle.Close();
+  }
+
+  base::win::ScopedCOMInitializer com_initializer;
+
+  AtlTrace(L"Launching Chrome via %ls.\n", shortcut.value().c_str());
+  int ser = reinterpret_cast<int>(
+      ::ShellExecute(NULL, NULL, shortcut.value().c_str(),
+                     ASCIIToWide(switches::kForceImmersive).c_str(), NULL,
+                     SW_SHOWNORMAL));
+  AtlTrace(L"ShellExecute returned %d.\n", ser);
+  return ser <= 32;
+}
+
+//
+extern "C" int WINAPI _tWinMain(HINSTANCE , HINSTANCE,
+                                LPTSTR, int nShowCmd) {
+  using delegate_execute::DelegateExecuteOperation;
+  base::AtExitManager exit_manager;
+
+  CommandLine::Init(0, NULL);
+  CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+  DelegateExecuteOperation operation;
+
+  operation.Initialize(cmd_line);
+  switch (operation.operation_type()) {
+    case DelegateExecuteOperation::EXE_MODULE:
+      return _AtlModule.WinMain(nShowCmd);
+
+    case DelegateExecuteOperation::RELAUNCH_CHROME:
+      return RelaunchChrome(operation.relaunch_shortcut(),
+          cmd_line->GetSwitchValueNative(switches::kWaitForHandle));
+
+    default:
+      NOTREACHED();
+  }
+
+  return 1;
+}
diff --git a/win8/delegate_execute/delegate_execute.gyp b/win8/delegate_execute/delegate_execute.gyp
new file mode 100644
index 0000000..e4feff4
--- /dev/null
+++ b/win8/delegate_execute/delegate_execute.gyp
@@ -0,0 +1,46 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'variables': {
+    'chromium_code': 1,
+  },
+  'includes': [
+    '../../build/win_precompile.gypi',
+  ],
+  'targets': [
+    {
+      'target_name': 'delegate_execute',
+      'type': 'executable',
+      'dependencies': [
+        '../../base/base.gyp:base',
+        '../../chrome/chrome.gyp:installer_util',
+        '../../google_update/google_update.gyp:google_update',
+        '../../win8/win8.gyp:check_sdk_patch',
+      ],
+      'sources': [
+        'chrome_util.cc',
+        'chrome_util.h',
+        'command_execute_impl.cc',
+        'command_execute_impl.h',
+        'command_execute_impl.rgs',
+        'delegate_execute.cc',
+        'delegate_execute.rc',
+        'delegate_execute.rgs',
+        'delegate_execute_operation.cc',
+        'delegate_execute_operation.h',
+        'resource.h',
+      ],
+      'defines': [
+        # This define is required to pull in the new Win8 interfaces from
+        # system headers like ShObjIdl.h
+        'NTDDI_VERSION=0x06020000',
+      ],
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'SubSystem': '2',  # Set /SUBSYSTEM:WINDOWS
+        },
+      },
+    },
+  ],
+}
diff --git a/win8/delegate_execute/delegate_execute.rgs b/win8/delegate_execute/delegate_execute.rgs
new file mode 100644
index 0000000..e7d3740
--- /dev/null
+++ b/win8/delegate_execute/delegate_execute.rgs
@@ -0,0 +1,3 @@
+HKCR
+{
+}
diff --git a/win8/delegate_execute/delegate_execute_operation.cc b/win8/delegate_execute/delegate_execute_operation.cc
new file mode 100644
index 0000000..e6823f0
--- /dev/null
+++ b/win8/delegate_execute/delegate_execute_operation.cc
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/delegate_execute/delegate_execute_operation.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+
+namespace delegate_execute {
+
+DelegateExecuteOperation::DelegateExecuteOperation()
+    : operation_type_(EXE_MODULE) {
+}
+
+DelegateExecuteOperation::~DelegateExecuteOperation() {
+  Clear();
+}
+
+void DelegateExecuteOperation::Initialize(const CommandLine* command_line) {
+  Clear();
+
+  // --relaunch-shortcut=PathToShortcut triggers the relaunch Chrome operation.
+  FilePath shortcut(
+      command_line->GetSwitchValuePath(switches::kRelaunchShortcut));
+  if (!shortcut.empty()) {
+    relaunch_shortcut_ = shortcut;
+    operation_type_ = RELAUNCH_CHROME;
+  }
+}
+
+void DelegateExecuteOperation::Clear() {
+  operation_type_ = EXE_MODULE;
+  relaunch_shortcut_.clear();
+}
+
+}  // namespace delegate_execute
diff --git a/win8/delegate_execute/delegate_execute_operation.h b/win8/delegate_execute/delegate_execute_operation.h
new file mode 100644
index 0000000..59acfd7a
--- /dev/null
+++ b/win8/delegate_execute/delegate_execute_operation.h
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_
+#define WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_
+
+#include <atldef.h>
+
+#include "base/basictypes.h"
+#include "base/file_path.h"
+
+class CommandLine;
+
+namespace delegate_execute {
+
+// Parses a portion of the DelegateExecute handler's command line to determine
+// the desired operation.
+class DelegateExecuteOperation {
+ public:
+  enum OperationType {
+    EXE_MODULE,
+    RELAUNCH_CHROME,
+  };
+
+  DelegateExecuteOperation();
+  ~DelegateExecuteOperation();
+
+  void Initialize(const CommandLine* command_line);
+
+  OperationType operation_type() const {
+    return operation_type_;
+  }
+
+  // Returns the argument to the --relaunch-shortcut switch.  Valid only when
+  // the operation is RELAUNCH_CHROME.
+  const FilePath& relaunch_shortcut() const {
+    ATLASSERT(operation_type_ == RELAUNCH_CHROME);
+    return relaunch_shortcut_;
+  }
+
+ private:
+  void Clear();
+
+  OperationType operation_type_;
+  FilePath relaunch_shortcut_;
+  DISALLOW_COPY_AND_ASSIGN(DelegateExecuteOperation);
+};
+
+}  // namespace delegate_execute
+
+#endif  // WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_
diff --git a/win8/delegate_execute/post_build.bat b/win8/delegate_execute/post_build.bat
new file mode 100644
index 0000000..8aa9a76
--- /dev/null
+++ b/win8/delegate_execute/post_build.bat
@@ -0,0 +1,3 @@
+REM invoke as:  post_build.bat OUTPUT_PATH_TO_EXE PATH_TO_CHROME_ROOT CONFIGURATION

+mkdir %2\build\%3

+copy %1 %2\build\%3\

diff --git a/win8/delegate_execute/resource.h b/win8/delegate_execute/resource.h
new file mode 100644
index 0000000..cb81bf0
--- /dev/null
+++ b/win8/delegate_execute/resource.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// {{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by DelegateExecute.rc
+//
+#define IDS_PROJNAME                    100
+#define IDR_DELEGATEEXECUTE             101
+#define IDR_COMMANDEXECUTEIMPL          106
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        201
+#define _APS_NEXT_COMMAND_VALUE         32768
+#define _APS_NEXT_CONTROL_VALUE         201
+#define _APS_NEXT_SYMED_VALUE           107
+#endif
+#endif
diff --git a/win8/metro_driver/OWNERS b/win8/metro_driver/OWNERS
new file mode 100644
index 0000000..3802937
--- /dev/null
+++ b/win8/metro_driver/OWNERS
@@ -0,0 +1,5 @@
+ananta@chromium.org
+cpu@chromium.org
+grt@chromium.org
+mad@chromium.org
+robertshield@chromium.org
\ No newline at end of file
diff --git a/win8/metro_driver/chrome_app_view.cc b/win8/metro_driver/chrome_app_view.cc
new file mode 100644
index 0000000..7d5580e
--- /dev/null
+++ b/win8/metro_driver/chrome_app_view.cc
@@ -0,0 +1,1059 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/metro_driver/stdafx.h"
+#include "win8/metro_driver/chrome_app_view.h"
+
+#include <algorithm>
+#include <windows.applicationModel.datatransfer.h>
+#include <windows.foundation.h>
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "base/win/metro.h"
+
+// This include allows to send WM_SYSCOMMANDs to chrome.
+#include "chrome/app/chrome_command_ids.h"
+#include "win8/metro_driver/winrt_utils.h"
+#include "ui/base/ui_base_switches.h"
+
+typedef winfoundtn::ITypedEventHandler<
+    winapp::Core::CoreApplicationView*,
+    winapp::Activation::IActivatedEventArgs*> ActivatedHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::Core::CoreWindow*,
+    winui::Core::WindowSizeChangedEventArgs*> SizeChangedHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::Input::EdgeGesture*,
+    winui::Input::EdgeGestureEventArgs*> EdgeEventHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    winapp::DataTransfer::DataTransferManager*,
+    winapp::DataTransfer::DataRequestedEventArgs*> ShareDataRequestedHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::ViewManagement::InputPane*,
+    winui::ViewManagement::InputPaneVisibilityEventArgs*>
+    InputPaneEventHandler;
+
+struct Globals globals;
+
+// TODO(ananta)
+// Remove this once we consolidate metro driver with chrome.
+const wchar_t kMetroGetCurrentTabInfoMessage[] =
+    L"CHROME_METRO_GET_CURRENT_TAB_INFO";
+
+static const int kFlipWindowsHotKeyId = 0x0000baba;
+
+static const int kAnimateWindowTimeoutMs = 200;
+
+static const int kCheckOSKDelayMs = 300;
+
+const wchar_t kOSKClassName[] = L"IPTip_Main_Window";
+
+static const int kOSKAdjustmentOffset = 20;
+
+namespace {
+
+void AdjustToFitWindow(HWND hwnd, int flags) {
+  RECT rect = {0};
+  ::GetWindowRect(globals.core_window, &rect);
+  int cx = rect.right - rect.left;
+  int cy = rect.bottom - rect.top;
+
+  ::SetWindowPos(hwnd, HWND_TOP,
+                 rect.left, rect.top, cx, cy,
+                 SWP_NOZORDER | flags);
+}
+
+void AdjustFrameWindowStyleForMetro(HWND hwnd) {
+  DVLOG(1) << __FUNCTION__;
+  // Ajust the frame so the live preview works and the frame buttons dissapear.
+  ::SetWindowLong(hwnd, GWL_STYLE,
+                  WS_POPUP | (::GetWindowLong(hwnd, GWL_STYLE) &
+                  ~(WS_MAXIMIZE | WS_CAPTION | WS_THICKFRAME | WS_SYSMENU)));
+  ::SetWindowLong(hwnd, GWL_EXSTYLE,
+                  ::GetWindowLong(hwnd, GWL_EXSTYLE) & ~(WS_EX_DLGMODALFRAME |
+                  WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE));
+  AdjustToFitWindow(hwnd, SWP_FRAMECHANGED | SWP_NOACTIVATE);
+}
+
+void SetFrameWindowInternal(HWND hwnd) {
+  DVLOG(1) << __FUNCTION__ << ", hwnd=" << LONG_PTR(hwnd);
+
+  HWND current_top_frame =
+      !globals.host_windows.empty() ? globals.host_windows.front().first : NULL;
+  if (hwnd != current_top_frame && IsWindow(current_top_frame)) {
+    DVLOG(1) << "Hiding current top window, hwnd="
+               << LONG_PTR(current_top_frame);
+    ::ShowWindow(current_top_frame, SW_HIDE);
+  }
+
+  // If chrome opens a url in a foreground tab, it may call SetFrameWindow
+  // again. Ensure that we don't have dups.
+  globals.host_windows.remove_if([hwnd](std::pair<HWND, bool>& item) {
+    return (item.first == hwnd);
+  });
+
+  globals.host_windows.push_front(std::make_pair(hwnd, false));
+
+  AdjustFrameWindowStyleForMetro(hwnd);
+}
+
+void CloseFrameWindowInternal(HWND hwnd) {
+  DVLOG(1) << __FUNCTION__ << ", hwnd=" << LONG_PTR(hwnd);
+
+  globals.host_windows.remove_if([hwnd](std::pair<HWND, bool>& item) {
+    return (item.first == hwnd);
+  });
+
+  if (globals.host_windows.size() > 0) {
+    DVLOG(1) << "Making new top frame window visible:"
+            << reinterpret_cast<int>(globals.host_windows.front().first);
+    AdjustToFitWindow(globals.host_windows.front().first, SWP_SHOWWINDOW);
+  } else {
+    // time to quit
+    DVLOG(1) << "Last host window closed. Calling Exit().";
+    globals.app_exit->Exit();
+  }
+}
+
+void FlipFrameWindowsInternal() {
+  DVLOG(1) << __FUNCTION__;
+  // Get the first window in the frame windows queue and push it to the end.
+  // Metroize the next window in the queue.
+  if (globals.host_windows.size() > 1) {
+    std::pair<HWND, bool> current_top_window = globals.host_windows.front();
+    globals.host_windows.pop_front();
+
+    DVLOG(1) << "Making new top frame window visible:"
+            <<  reinterpret_cast<int>(globals.host_windows.front().first);
+
+    AdjustToFitWindow(globals.host_windows.front().first, SWP_SHOWWINDOW);
+
+    DVLOG(1) << "Hiding current top window:"
+            << reinterpret_cast<int>(current_top_window.first);
+    AnimateWindow(current_top_window.first, kAnimateWindowTimeoutMs,
+                  AW_HIDE | AW_HOR_POSITIVE | AW_SLIDE);
+
+    globals.host_windows.push_back(current_top_window);
+  }
+}
+
+}  // namespace
+
+HRESULT ChromeAppView::TileRequestCreateDone(
+    winfoundtn::IAsyncOperation<bool>* async,
+    AsyncStatus status) {
+  if (status == Completed) {
+    unsigned char result;
+    CheckHR(async->GetResults(&result));
+    DVLOG(1) << __FUNCTION__ << " result " << static_cast<int>(result);
+  } else {
+    LOG(ERROR) << __FUNCTION__ << " Unexpected async status " << status;
+  }
+
+  return S_OK;
+}
+
+void ChromeAppView::DisplayNotification(
+    const ToastNotificationHandler::DesktopNotification& notification) {
+  DVLOG(1) << __FUNCTION__;
+
+  if (IsValidNotification(notification.id)) {
+    NOTREACHED() << "Duplicate notification id passed in.";
+    return;
+  }
+
+  base::AutoLock lock(notification_lock_);
+
+  ToastNotificationHandler* notification_handler =
+      new ToastNotificationHandler;
+
+  notification_map_[notification.id].reset(notification_handler);
+  notification_handler->DisplayNotification(notification);
+}
+
+void ChromeAppView::CancelNotification(const std::string& notification) {
+  DVLOG(1) << __FUNCTION__;
+
+  base::AutoLock lock(notification_lock_);
+
+  NotificationMap::iterator index = notification_map_.find(notification);
+  if (index == notification_map_.end()) {
+    NOTREACHED() << "Invalid notification:" << notification.c_str();
+    return;
+  }
+
+  scoped_ptr<ToastNotificationHandler> notification_handler(
+      index->second.release());
+
+  notification_map_.erase(index);
+
+  notification_handler->CancelNotification();
+}
+
+// Returns true if the notification passed in is valid.
+bool ChromeAppView::IsValidNotification(const std::string& notification) {
+  DVLOG(1) << __FUNCTION__;
+
+  base::AutoLock lock(notification_lock_);
+  return notification_map_.find(notification) != notification_map_.end();
+}
+
+void ChromeAppView::ShowDialogBox(
+    const MetroDialogBox::DialogBoxInfo& dialog_box_info) {
+  VLOG(1) << __FUNCTION__;
+  dialog_box_.Show(dialog_box_info);
+}
+
+void ChromeAppView::DismissDialogBox() {
+  VLOG(1) << __FUNCTION__;
+  dialog_box_.Dismiss();
+}
+
+// static
+HRESULT ChromeAppView::Unsnap() {
+  mswr::ComPtr<winui::ViewManagement::IApplicationViewStatics> view_statics;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_ViewManagement_ApplicationView,
+      view_statics.GetAddressOf());
+  CheckHR(hr);
+
+  winui::ViewManagement::ApplicationViewState state =
+      winui::ViewManagement::ApplicationViewState_FullScreenLandscape;
+  hr = view_statics->get_Value(&state);
+  CheckHR(hr);
+
+  if (state == winui::ViewManagement::ApplicationViewState_Snapped) {
+    boolean success = FALSE;
+    hr = view_statics->TryUnsnap(&success);
+
+    if (FAILED(hr) || !success) {
+      LOG(ERROR) << "Failed to unsnap. Error 0x" << hr;
+      if (SUCCEEDED(hr))
+        hr = E_UNEXPECTED;
+    }
+  }
+  return hr;
+}
+
+void ChromeAppView::SetFullscreen(bool fullscreen) {
+  VLOG(1) << __FUNCTION__;
+
+  if (osk_offset_adjustment_) {
+    VLOG(1) << "Scrolling the window down by: "
+            << osk_offset_adjustment_;
+
+    ::ScrollWindowEx(globals.host_windows.front().first,
+                     0,
+                     osk_offset_adjustment_,
+                     NULL,
+                     NULL,
+                     NULL,
+                     NULL,
+                     SW_INVALIDATE | SW_SCROLLCHILDREN);
+    osk_offset_adjustment_ = 0;
+  }
+}
+
+void UnsnapHelper() {
+  ChromeAppView::Unsnap();
+}
+
+extern "C" __declspec(dllexport)
+void MetroUnsnap() {
+  DVLOG(1) << __FUNCTION__;
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&UnsnapHelper));
+}
+
+extern "C" __declspec(dllexport)
+HWND GetRootWindow() {
+  DVLOG(1) << __FUNCTION__;
+  return globals.core_window;
+}
+
+extern "C" __declspec(dllexport)
+void SetFrameWindow(HWND hwnd) {
+  DVLOG(1) << __FUNCTION__ << ", hwnd=" << LONG_PTR(hwnd);
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&SetFrameWindowInternal, hwnd));
+}
+
+// TODO(ananta)
+// Handle frame window close by deleting it from the window list and making the
+// next guy visible.
+extern "C" __declspec(dllexport)
+  void CloseFrameWindow(HWND hwnd) {
+  DVLOG(1) << __FUNCTION__ << ", hwnd=" << LONG_PTR(hwnd);
+
+  // This is a hack to ensure that the BrowserViewLayout code layout happens
+  // just at the right time to hide the switcher button if it is visible.
+  globals.appview_msg_loop->PostDelayedTask(
+    FROM_HERE, base::Bind(&CloseFrameWindowInternal, hwnd),
+        base::TimeDelta::FromMilliseconds(50));
+}
+
+// Returns the initial url. This returns a valid url only if we were launched
+// into metro via a url navigation.
+extern "C" __declspec(dllexport)
+const wchar_t* GetInitialUrl() {
+  DVLOG(1) << __FUNCTION__;
+  bool was_initial_activation = globals.is_initial_activation;
+  globals.is_initial_activation = false;
+  if (!was_initial_activation || globals.navigation_url.empty())
+    return L"";
+
+  const wchar_t* initial_url = globals.navigation_url.c_str();
+  DVLOG(1) << initial_url;
+  return initial_url;
+}
+
+// Returns the initial search string. This returns a valid url only if we were
+// launched into metro via the search charm
+extern "C" __declspec(dllexport)
+const wchar_t* GetInitialSearchString() {
+  DVLOG(1) << __FUNCTION__;
+  bool was_initial_activation = globals.is_initial_activation;
+  globals.is_initial_activation = false;
+  if (!was_initial_activation || globals.search_string.empty())
+    return L"";
+
+  const wchar_t* initial_search_string = globals.search_string.c_str();
+  DVLOG(1) << initial_search_string;
+  return initial_search_string;
+}
+
+// Returns the launch type.
+extern "C" __declspec(dllexport)
+base::win::MetroLaunchType GetLaunchType(
+    base::win::MetroPreviousExecutionState* previous_state) {
+  if (previous_state) {
+    *previous_state = static_cast<base::win::MetroPreviousExecutionState>(
+        globals.previous_state);
+  }
+  return static_cast<base::win::MetroLaunchType>(
+      globals.initial_activation_kind);
+}
+
+extern "C" __declspec(dllexport)
+void FlipFrameWindows() {
+  DVLOG(1) << __FUNCTION__;
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&FlipFrameWindowsInternal));
+}
+
+extern "C" __declspec(dllexport)
+void DisplayNotification(const char* origin_url, const char* icon_url,
+                         const wchar_t* title, const wchar_t* body,
+                         const wchar_t* display_source,
+                         const char* notification_id) {
+  // TODO(ananta)
+  // Needs implementation.
+  DVLOG(1) << __FUNCTION__;
+
+  ToastNotificationHandler::DesktopNotification notification(origin_url,
+                                                             icon_url,
+                                                             title,
+                                                             body,
+                                                             display_source,
+                                                             notification_id);
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&ChromeAppView::DisplayNotification,
+                            globals.view, notification));
+}
+
+extern "C" __declspec(dllexport)
+bool CancelNotification(const char* notification_id) {
+  // TODO(ananta)
+  // Needs implementation.
+  DVLOG(1) << __FUNCTION__;
+
+  if (!globals.view->IsValidNotification(notification_id)) {
+    NOTREACHED() << "Invalid notification id :" << notification_id;
+    return false;
+  }
+
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&ChromeAppView::CancelNotification,
+                            globals.view, std::string(notification_id)));
+  return true;
+}
+
+// Returns command line switches if any to be used by metro chrome.
+extern "C" __declspec(dllexport)
+const wchar_t* GetMetroCommandLineSwitches() {
+  DVLOG(1) << __FUNCTION__;
+  // The metro_command_line_switches field should be filled up once.
+  // ideally in ChromeAppView::Activate.
+  return globals.metro_command_line_switches.c_str();
+}
+
+// Provides functionality to display a metro style dialog box with two buttons.
+// Only one dialog box can be displayed at any given time.
+extern "C" __declspec(dllexport)
+void ShowDialogBox(
+    const wchar_t* title,
+    const wchar_t* content,
+    const wchar_t* button1_label,
+    const wchar_t* button2_label,
+    base::win::MetroDialogButtonPressedHandler button1_handler,
+    base::win::MetroDialogButtonPressedHandler button2_handler) {
+  VLOG(1) << __FUNCTION__;
+
+  DCHECK(title);
+  DCHECK(content);
+  DCHECK(button1_label);
+  DCHECK(button2_label);
+  DCHECK(button1_handler);
+  DCHECK(button2_handler);
+
+  MetroDialogBox::DialogBoxInfo dialog_box_info;
+  dialog_box_info.title = title;
+  dialog_box_info.content = content;
+  dialog_box_info.button1_label = button1_label;
+  dialog_box_info.button2_label = button2_label;
+  dialog_box_info.button1_handler = button1_handler;
+  dialog_box_info.button2_handler = button2_handler;
+
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(
+          &ChromeAppView::ShowDialogBox, globals.view, dialog_box_info));
+}
+
+// Provides functionality to dismiss the previously displayed metro style
+// dialog box.
+extern "C" __declspec(dllexport)
+void DismissDialogBox() {
+  VLOG(1) << __FUNCTION__;
+
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(
+          &ChromeAppView::DismissDialogBox,
+          globals.view));
+}
+
+extern "C" __declspec(dllexport)
+void SetFullscreen(bool fullscreen) {
+  VLOG(1) << __FUNCTION__;
+
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(
+          &ChromeAppView::SetFullscreen,
+          globals.view, fullscreen));
+}
+
+BOOL CALLBACK CoreWindowFinder(HWND hwnd, LPARAM) {
+  char classname[128];
+  if (::GetClassNameA(hwnd, classname, ARRAYSIZE(classname))) {
+    if (lstrcmpiA("Windows.UI.Core.CoreWindow", classname) == 0) {
+      globals.core_window = hwnd;
+      return FALSE;
+    }
+  }
+  return TRUE;
+}
+
+template <typename ContainerT>
+void CloseSecondaryWindows(ContainerT& windows) {
+  DVLOG(1) << "Closing secondary windows", windows.size();
+  std::for_each(windows.begin(), windows.end(), [](HWND hwnd) {
+    ::PostMessageW(hwnd, WM_CLOSE, 0, 0);
+  });
+  windows.clear();
+}
+
+void EndChromeSession() {
+  DVLOG(1) << "Sending chrome WM_ENDSESSION window message.";
+  ::SendMessage(globals.host_windows.front().first, WM_ENDSESSION, FALSE,
+                ENDSESSION_CLOSEAPP);
+}
+
+DWORD WINAPI HostMainThreadProc(void*) {
+  // Test feature - devs have requested the ability to easily add metro-chrome
+  // command line arguments. This is hard since shortcut arguments are ignored,
+  // by Metro, so we instead read them directly from the pinned taskbar
+  // shortcut. This may call Coinitialize and there is tell of badness
+  // occurring if CoInitialize is called on a metro thread.
+  globals.metro_command_line_switches =
+      winrt_utils::ReadArgumentsFromPinnedTaskbarShortcut();
+
+  globals.g_core_proc = reinterpret_cast<WNDPROC>(
+      ::SetWindowLong(globals.core_window, GWL_WNDPROC,
+                      reinterpret_cast<long>(ChromeAppView::CoreWindowProc)));
+  DWORD exit_code = globals.host_main(globals.host_context);
+  DVLOG(1) << "host thread done, exit_code=" << exit_code;
+  globals.app_exit->Exit();
+  return exit_code;
+}
+
+ChromeAppView::ChromeAppView()
+    : osk_visible_notification_received_(false),
+      osk_offset_adjustment_(0) {
+  globals.previous_state =
+      winapp::Activation::ApplicationExecutionState_NotRunning;
+}
+
+ChromeAppView::~ChromeAppView() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+IFACEMETHODIMP
+ChromeAppView::Initialize(winapp::Core::ICoreApplicationView* view) {
+  view_ = view;
+  DVLOG(1) << __FUNCTION__;
+  globals.main_thread_id = ::GetCurrentThreadId();
+
+  HRESULT hr = view_->add_Activated(mswr::Callback<ActivatedHandler>(
+      this, &ChromeAppView::OnActivate).Get(),
+      &activated_token_);
+  CheckHR(hr);
+  return hr;
+}
+
+IFACEMETHODIMP
+ChromeAppView::SetWindow(winui::Core::ICoreWindow* window) {
+  window_ = window;
+  DVLOG(1) << __FUNCTION__;
+
+  HRESULT hr = url_launch_handler_.Initialize();
+  CheckHR(hr, "Failed to initialize url launch handler.");
+
+  // Register for size notifications.
+  hr = window_->add_SizeChanged(mswr::Callback<SizeChangedHandler>(
+      this, &ChromeAppView::OnSizeChanged).Get(),
+      &sizechange_token_);
+  CheckHR(hr);
+
+  // Register for edge gesture notifications.
+  mswr::ComPtr<winui::Input::IEdgeGestureStatics> edge_gesture_statics;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_Input_EdgeGesture,
+      edge_gesture_statics.GetAddressOf());
+  CheckHR(hr, "Failed to activate IEdgeGestureStatics.");
+
+  mswr::ComPtr<winui::Input::IEdgeGesture> edge_gesture;
+  hr = edge_gesture_statics->GetForCurrentView(&edge_gesture);
+  CheckHR(hr);
+
+  hr = edge_gesture->add_Completed(mswr::Callback<EdgeEventHandler>(
+      this, &ChromeAppView::OnEdgeGestureCompleted).Get(),
+      &edgeevent_token_);
+  CheckHR(hr);
+
+  // Register for share notifications.
+  mswr::ComPtr<winapp::DataTransfer::IDataTransferManagerStatics>
+      data_mgr_statics;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_ApplicationModel_DataTransfer_DataTransferManager,
+      data_mgr_statics.GetAddressOf());
+  CheckHR(hr, "Failed to activate IDataTransferManagerStatics.");
+
+  mswr::ComPtr<winapp::DataTransfer::IDataTransferManager> data_transfer_mgr;
+  hr = data_mgr_statics->GetForCurrentView(&data_transfer_mgr);
+  CheckHR(hr, "Failed to get IDataTransferManager for current view.");
+
+  hr = data_transfer_mgr->add_DataRequested(
+      mswr::Callback<ShareDataRequestedHandler>(
+          this, &ChromeAppView::OnShareDataRequested).Get(),
+      &share_data_requested_token_);
+  CheckHR(hr);
+
+  // TODO(ananta)
+  // The documented InputPane notifications don't fire on Windows 8 in metro
+  // chrome. Uncomment this once we figure out why they don't fire.
+  // RegisterInputPaneNotifications();
+
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_ViewManagement_ApplicationView,
+      app_view_.GetAddressOf());
+  CheckHR(hr);
+
+  DVLOG(1) << "Created appview instance.";
+
+  hr = devices_handler_.Initialize(window);
+  // Don't check or return the failure here, we need to let the app
+  // initialization succeed. Even if we won't be able to access devices
+  // we still want to allow the app to start.
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to initialize devices handler.";
+  return S_OK;
+}
+
+IFACEMETHODIMP
+ChromeAppView::Load(HSTRING entryPoint) {
+  DVLOG(1) << __FUNCTION__;
+  return S_OK;
+}
+
+void RunMessageLoop(winui::Core::ICoreDispatcher* dispatcher) {
+  // We're entering a nested message loop, let's allow dispatching
+  // tasks while we're in there.
+  MessageLoop::current()->SetNestableTasksAllowed(true);
+
+  // Enter main core message loop. There are several ways to exit it
+  // Nicely:
+  // 1 - User action like ALT-F4.
+  // 2 - Calling ICoreApplicationExit::Exit().
+  // 3-  Posting WM_CLOSE to the core window.
+  HRESULT hr = dispatcher->ProcessEvents(
+      winui::Core::CoreProcessEventsOption
+          ::CoreProcessEventsOption_ProcessUntilQuit);
+
+  // Wind down the thread's chrome message loop.
+  MessageLoop::current()->Quit();
+}
+
+void ChromeAppView::CheckForOSKActivation() {
+  // Hack for checking if the OSK was displayed while we are in the foreground.
+  // The input pane notifications which are supposed to fire when the OSK is
+  // shown and hidden don't seem to be firing in Windows 8 metro for us.
+  // The current hack is supposed to workaround that issue till we figure it
+  // out. Logic is to find the OSK window and see if we are the foreground
+  // process. If yes then fire the notification once for when the OSK is shown
+  // and once for when it is hidden.
+  // TODO(ananta)
+  // Take this out when the documented input pane notifcation issues are
+  // addressed.
+  HWND osk = ::FindWindow(kOSKClassName, NULL);
+  if (::IsWindow(osk)) {
+    HWND foreground_window = ::GetForegroundWindow();
+    if (globals.host_windows.size() > 0 &&
+        foreground_window == globals.host_windows.front().first) {
+      RECT osk_rect = {0};
+      ::GetWindowRect(osk, &osk_rect);
+
+      if (::IsWindowVisible(osk) && ::IsWindowEnabled(osk)) {
+        if (!globals.view->osk_visible_notification_received()) {
+          DVLOG(1) << "Found KB window while we are in the forground.";
+          HandleInputPaneVisible(osk_rect);
+        }
+      } else if (osk_visible_notification_received()) {
+        DVLOG(1) << "KB window hidden while we are in the foreground.";
+        HandleInputPaneHidden(osk_rect);
+      }
+    }
+  }
+  MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&ChromeAppView::CheckForOSKActivation,
+                 base::Unretained(this)),
+      base::TimeDelta::FromMilliseconds(kCheckOSKDelayMs));
+}
+
+IFACEMETHODIMP
+ChromeAppView::Run() {
+  DVLOG(1) << __FUNCTION__ << ", hwnd=" << LONG_PTR(window_.Get());
+  mswr::ComPtr<winui::Core::ICoreDispatcher> dispatcher;
+  HRESULT hr = window_->get_Dispatcher(&dispatcher);
+  CheckHR(hr, "Dispatcher failed.");
+
+  hr = window_->Activate();
+  if (SUCCEEDED(hr)) {
+    // TODO(cpu): Draw something here.
+  } else {
+    DVLOG(1) << "Activate failed, hr=" << hr;
+  }
+
+  // Create a message loop to allow message passing into this thread.
+  MessageLoop msg_loop(MessageLoop::TYPE_UI);
+
+  // Announce our message loop to the world.
+  globals.appview_msg_loop = msg_loop.message_loop_proxy();
+
+  // And post the task that'll do the inner Metro message pumping to it.
+  msg_loop.PostTask(FROM_HERE, base::Bind(&RunMessageLoop, dispatcher.Get()));
+
+  // Post the recurring task which checks for OSK activation in metro chrome.
+  // Please refer to the comments in the CheckForOSKActivation function for why
+  // this is needed.
+  // TODO(ananta)
+  // Take this out when the documented OSK notifications start working.
+  msg_loop.PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&ChromeAppView::CheckForOSKActivation,
+                 base::Unretained(this)),
+      base::TimeDelta::FromMilliseconds(kCheckOSKDelayMs));
+
+  msg_loop.Run();
+
+  globals.appview_msg_loop = NULL;
+
+  DVLOG(0) << "ProcessEvents done, hr=" << hr;
+
+  // We join here with chrome's main thread so that the chrome is not killed
+  // while a critical operation is still in progress. Now, if there are host
+  // windows active it is possible we end up stuck on the wait below therefore
+  // we tell chrome to close its windows.
+  if (!globals.host_windows.empty()) {
+    DVLOG(1) << "Chrome still has windows open!";
+    EndChromeSession();
+  }
+  DWORD wr = ::WaitForSingleObject(globals.host_thread, INFINITE);
+  if (wr != WAIT_OBJECT_0) {
+    DVLOG(1) << "Waiting for host thread failed : " << wr;
+  }
+  ::CloseHandle(globals.host_thread);
+  globals.host_thread = NULL;
+
+  return hr;
+}
+
+IFACEMETHODIMP
+ChromeAppView::Uninitialize() {
+  DVLOG(1) << __FUNCTION__;
+  window_ = nullptr;
+  view_ = nullptr;
+  base::AutoLock lock(notification_lock_);
+  notification_map_.clear();
+  return S_OK;
+}
+
+HRESULT ChromeAppView::RegisterInputPaneNotifications() {
+  DVLOG(1) << __FUNCTION__;
+
+  mswr::ComPtr<winui::ViewManagement::IInputPaneStatics>
+      input_pane_statics;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_ViewManagement_InputPane,
+      input_pane_statics.GetAddressOf());
+  CheckHR(hr);
+
+  hr = input_pane_statics->GetForCurrentView(&input_pane_);
+  CheckHR(hr);
+  DVLOG(1) << "Got input pane.";
+
+  hr = input_pane_->add_Showing(
+      mswr::Callback<InputPaneEventHandler>(
+          this, &ChromeAppView::OnInputPaneVisible).Get(),
+      &input_pane_visible_token_);
+  CheckHR(hr);
+
+  DVLOG(1) << "Added showing event handler for input pane",
+      input_pane_visible_token_.value;
+
+  hr = input_pane_->add_Hiding(
+      mswr::Callback<InputPaneEventHandler>(
+          this, &ChromeAppView::OnInputPaneHiding).Get(),
+      &input_pane_hiding_token_);
+  CheckHR(hr);
+
+  DVLOG(1) << "Added hiding event handler for input pane, value="
+          << input_pane_hiding_token_.value;
+  return hr;
+}
+
+HRESULT ChromeAppView::OnActivate(winapp::Core::ICoreApplicationView*,
+    winapp::Activation::IActivatedEventArgs* args) {
+  DVLOG(1) << __FUNCTION__;
+
+  args->get_PreviousExecutionState(&globals.previous_state);
+  DVLOG(1) << "Previous Execution State: " << globals.previous_state;
+
+  window_->Activate();
+  url_launch_handler_.Activate(args);
+
+  if (globals.previous_state ==
+      winapp::Activation::ApplicationExecutionState_Running &&
+      globals.host_thread) {
+    DVLOG(1) << "Already running. Skipping rest of OnActivate.";
+    return S_OK;
+  }
+
+  do {
+    ::Sleep(10);
+    ::EnumThreadWindows(globals.main_thread_id, &CoreWindowFinder, 0);
+  } while (globals.core_window == NULL);
+
+  DVLOG(1) << "CoreWindow found: " << std::hex << globals.core_window;
+
+  if (!globals.host_thread) {
+    globals.host_thread =
+        ::CreateThread(NULL, 0, HostMainThreadProc, NULL, 0, NULL);
+
+    if (!globals.host_thread) {
+      NOTREACHED() << "thread creation failed.";
+      return E_UNEXPECTED;
+    }
+  }
+
+  if (RegisterHotKey(globals.core_window, kFlipWindowsHotKeyId,
+                     MOD_CONTROL, VK_F12)) {
+    DVLOG(1) << "Registered flip window hotkey.";
+  } else {
+    VPLOG(1) << "Failed to register flip window hotkey.";
+  }
+  HRESULT hr = settings_handler_.Initialize();
+  CheckHR(hr,"Failed to initialize settings handler.");
+  return hr;
+}
+
+// We subclass the core window for moving the associated chrome window when the
+// core window is moved around, typically in the snap view operation. The
+// size changes are handled in the documented size changed event.
+LRESULT CALLBACK ChromeAppView::CoreWindowProc(
+    HWND window, UINT message, WPARAM wp, LPARAM lp) {
+
+  static const UINT kBrowserClosingMessage =
+      ::RegisterWindowMessage(L"DefaultBrowserClosing");
+
+  if (message == WM_WINDOWPOSCHANGED) {
+    WINDOWPOS* pos = reinterpret_cast<WINDOWPOS*>(lp);
+    if (!(pos->flags & SWP_NOMOVE)) {
+      DVLOG(1) << "WM_WINDOWPOSCHANGED. Moving the chrome window.";
+      globals.view->OnPositionChanged(pos->x, pos->y);
+    }
+  } else if (message == WM_HOTKEY && wp == kFlipWindowsHotKeyId) {
+    FlipFrameWindows();
+  } else if (message == kBrowserClosingMessage) {
+    DVLOG(1) << "Received DefaultBrowserClosing window message.";
+    // Ensure that the view is uninitialized. The kBrowserClosingMessage
+    // means that the app is going to be terminated, i.e. the proper
+    // uninitialization sequence does not occur.
+    globals.view->Uninitialize();
+    if (!globals.host_windows.empty()) {
+      EndChromeSession();
+    }
+  }
+  return CallWindowProc(globals.g_core_proc, window, message, wp, lp);
+}
+
+HRESULT ChromeAppView::OnSizeChanged(winui::Core::ICoreWindow* sender,
+    winui::Core::IWindowSizeChangedEventArgs* args) {
+  if (!globals.host_windows.size()) {
+    return S_OK;
+  }
+
+  winfoundtn::Size size;
+  args->get_Size(&size);
+
+  int cx = static_cast<int>(size.Width);
+  int cy = static_cast<int>(size.Height);
+
+  if (!::SetWindowPos(globals.host_windows.front().first, NULL, 0, 0, cx, cy,
+                      SWP_NOMOVE | SWP_NOZORDER | SWP_FRAMECHANGED)) {
+    DVLOG(1) << "SetWindowPos failed.";
+  }
+  DVLOG(1) << "size changed cx=" << cx;
+  DVLOG(1) << "size changed cy=" << cy;
+
+  winui::ViewManagement::ApplicationViewState view_state =
+      winui::ViewManagement::ApplicationViewState_FullScreenLandscape;
+  app_view_->get_Value(&view_state);
+
+  HWND top_level_frame = globals.host_windows.front().first;
+  if (view_state == winui::ViewManagement::ApplicationViewState_Snapped) {
+    DVLOG(1) << "Enabling metro snap mode.";
+    ::PostMessageW(top_level_frame, WM_SYSCOMMAND, IDC_METRO_SNAP_ENABLE, 0);
+  } else {
+    ::PostMessageW(top_level_frame, WM_SYSCOMMAND, IDC_METRO_SNAP_DISABLE, 0);
+  }
+  return S_OK;
+}
+
+HRESULT ChromeAppView::OnPositionChanged(int x, int y) {
+  DVLOG(1) << __FUNCTION__;
+
+  ::SetWindowPos(globals.host_windows.front().first, NULL, x, y, 0, 0,
+                 SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOSIZE);
+  return S_OK;
+}
+
+HRESULT ChromeAppView::OnEdgeGestureCompleted(
+    winui::Input::IEdgeGesture* gesture,
+    winui::Input::IEdgeGestureEventArgs* args) {
+  DVLOG(1) << "edge gesture completed.";
+
+  winui::ViewManagement::ApplicationViewState view_state =
+      winui::ViewManagement::ApplicationViewState_FullScreenLandscape;
+  app_view_->get_Value(&view_state);
+  // We don't want fullscreen chrome unless we are fullscreen metro.
+  if ((view_state == winui::ViewManagement::ApplicationViewState_Filled) ||
+      (view_state == winui::ViewManagement::ApplicationViewState_Snapped)) {
+    DVLOG(1) << "No full screen in snapped view state:" << view_state;
+    return S_OK;
+  }
+
+  // Deactivate anything pending, e.g., the wrench or a context menu.
+  BOOL success = ::ReleaseCapture();
+  DCHECK(success) << "Couldn't ReleaseCapture() before going full screen";
+
+  DVLOG(1) << "Going full screen.";
+  ::PostMessageW(globals.host_windows.front().first, WM_SYSCOMMAND,
+                 IDC_FULLSCREEN, 0);
+  return S_OK;
+}
+
+HRESULT ChromeAppView::OnShareDataRequested(
+  winapp::DataTransfer::IDataTransferManager* data_transfer_mgr,
+  winapp::DataTransfer::IDataRequestedEventArgs* event_args) {
+
+  DVLOG(1) << "Share data requested.";
+
+  // The current tab info is retrieved from Chrome via a registered window
+  // message.
+
+  static const UINT get_current_tab_info =
+      RegisterWindowMessage(kMetroGetCurrentTabInfoMessage);
+
+  static const int kGetTabInfoTimeoutMs = 1000;
+
+  mswr::ComPtr<winapp::DataTransfer::IDataRequest> data_request;
+  HRESULT hr = event_args->get_Request(&data_request);
+  CheckHR(hr);
+
+  mswr::ComPtr<winapp::DataTransfer::IDataPackage> data_package;
+  hr = data_request->get_Data(&data_package);
+  CheckHR(hr);
+
+  base::win::CurrentTabInfo current_tab_info;
+  current_tab_info.title = NULL;
+  current_tab_info.url = NULL;
+
+  DWORD_PTR result = 0;
+
+  if (!SendMessageTimeout(globals.host_windows.front().first,
+                          get_current_tab_info,
+                          reinterpret_cast<WPARAM>(&current_tab_info),
+                          0,
+                          SMTO_ABORTIFHUNG,
+                          kGetTabInfoTimeoutMs,
+                          &result)) {
+    VPLOG(1) << "Failed to retrieve tab info from chrome.";
+    return E_FAIL;
+  }
+
+  if (!current_tab_info.title || !current_tab_info.url) {
+    DVLOG(1) << "Failed to retrieve tab info from chrome.";
+    return E_FAIL;
+  }
+
+  string16 current_title(current_tab_info.title);
+  string16 current_url(current_tab_info.url);
+
+  LocalFree(current_tab_info.title);
+  LocalFree(current_tab_info.url);
+
+  mswr::ComPtr<winapp::DataTransfer::IDataPackagePropertySet> data_properties;
+  hr = data_package->get_Properties(&data_properties);
+
+  mswrw::HString title;
+  title.Attach(MakeHString(current_title));
+  data_properties->put_Title(title.Get());
+
+  mswr::ComPtr<winfoundtn::IUriRuntimeClassFactory> uri_factory;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Foundation_Uri,
+      uri_factory.GetAddressOf());
+  CheckHR(hr);
+
+  mswrw::HString url;
+  url.Attach(MakeHString(current_url));
+  mswr::ComPtr<winfoundtn::IUriRuntimeClass> uri;
+  hr = uri_factory->CreateUri(url.Get(), &uri);
+  CheckHR(hr);
+
+  hr = data_package->SetUri(uri.Get());
+  CheckHR(hr);
+
+  return S_OK;
+}
+
+void ChromeAppView::HandleInputPaneVisible(const RECT& osk_rect) {
+  DCHECK(!osk_visible_notification_received_);
+
+  DVLOG(1) << __FUNCTION__;
+  DVLOG(1) << "OSK width:" << osk_rect.right - osk_rect.left;
+  DVLOG(1) << "OSK height:" << osk_rect.bottom - osk_rect.top;
+
+  globals.host_windows.front().second = false;
+
+  POINT cursor_pos = {0};
+  GetCursorPos(&cursor_pos);
+
+  osk_offset_adjustment_ = 0;
+
+  if (::PtInRect(&osk_rect, cursor_pos)) {
+    DVLOG(1) << "OSK covering focus point.";
+    int osk_height = osk_rect.bottom - osk_rect.top;
+
+    osk_offset_adjustment_ = osk_height + kOSKAdjustmentOffset;
+
+    DVLOG(1) << "Scrolling window by offset: " << osk_offset_adjustment_;
+    ::ScrollWindowEx(globals.host_windows.front().first,
+                     0,
+                     -osk_offset_adjustment_,
+                     NULL,
+                     NULL,
+                     NULL,
+                     NULL,
+                     SW_INVALIDATE | SW_SCROLLCHILDREN);
+
+    globals.host_windows.front().second  = true;
+  }
+  osk_visible_notification_received_ = true;
+}
+
+void ChromeAppView::HandleInputPaneHidden(const RECT& osk_rect) {
+  DCHECK(osk_visible_notification_received_);
+  DVLOG(1) << __FUNCTION__;
+  DVLOG(1) << "OSK width:" << osk_rect.right - osk_rect.left;
+  DVLOG(1) << "OSK height:" << osk_rect.bottom - osk_rect.top;
+  osk_visible_notification_received_ = false;
+  if (globals.host_windows.front().second == true) {
+
+    if (osk_offset_adjustment_) {
+      DVLOG(1) << "Restoring scrolled window offset: "
+               << osk_offset_adjustment_;
+
+      ::ScrollWindowEx(globals.host_windows.front().first,
+                       0,
+                       osk_offset_adjustment_,
+                       NULL,
+                       NULL,
+                       NULL,
+                       NULL,
+                       SW_INVALIDATE | SW_SCROLLCHILDREN);
+    }
+
+    globals.host_windows.front().second = false;
+  }
+}
+
+HRESULT ChromeAppView::OnInputPaneVisible(
+    winui::ViewManagement::IInputPane* input_pane,
+    winui::ViewManagement::IInputPaneVisibilityEventArgs* event_args) {
+  DVLOG(1) << __FUNCTION__;
+  return S_OK;
+}
+
+HRESULT ChromeAppView::OnInputPaneHiding(
+    winui::ViewManagement::IInputPane* input_pane,
+    winui::ViewManagement::IInputPaneVisibilityEventArgs* event_args) {
+  DVLOG(1) << __FUNCTION__;
+  return S_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+ChromeAppViewFactory::ChromeAppViewFactory(
+    winapp::Core::ICoreApplication* icore_app,
+    LPTHREAD_START_ROUTINE host_main,
+    void* host_context) {
+  globals.host_main = host_main;
+  globals.host_context = host_context;
+  mswr::ComPtr<winapp::Core::ICoreApplication> core_app(icore_app);
+  mswr::ComPtr<winapp::Core::ICoreApplicationExit> app_exit;
+  CheckHR(core_app.As(&app_exit));
+  globals.app_exit = app_exit.Detach();
+}
+
+IFACEMETHODIMP
+ChromeAppViewFactory::CreateView(winapp::Core::IFrameworkView** view) {
+  globals.view = mswr::Make<ChromeAppView>().Detach();
+  *view = globals.view;
+  return (*view) ? S_OK :  E_OUTOFMEMORY;
+}
diff --git a/win8/metro_driver/chrome_app_view.h b/win8/metro_driver/chrome_app_view.h
new file mode 100644
index 0000000..80f309d
--- /dev/null
+++ b/win8/metro_driver/chrome_app_view.h
@@ -0,0 +1,177 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_CHROME_APP_VIEW_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_CHROME_APP_VIEW_H_
+
+#include <windows.applicationmodel.core.h>
+#include <windows.ui.core.h>
+#include <windows.ui.input.h>
+#include <windows.ui.viewmanagement.h>
+
+#include <list>
+#include <map>
+#include <string>
+#include <utility>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/synchronization/lock.h"
+#include "win8/metro_driver/chrome_url_launch_handler.h"
+#include "win8/metro_driver/devices_handler.h"
+#include "win8/metro_driver/metro_dialog_box.h"
+#include "win8/metro_driver/settings_handler.h"
+#include "win8/metro_driver/toast_notification_handler.h"
+
+class ChromeAppView
+    : public mswr::RuntimeClass<winapp::Core::IFrameworkView> {
+ public:
+  ChromeAppView();
+  ~ChromeAppView();
+
+  // IViewProvider overrides.
+  IFACEMETHOD(Initialize)(winapp::Core::ICoreApplicationView* view);
+  IFACEMETHOD(SetWindow)(winui::Core::ICoreWindow* window);
+  IFACEMETHOD(Load)(HSTRING entryPoint);
+  IFACEMETHOD(Run)();
+  IFACEMETHOD(Uninitialize)();
+
+  static LRESULT CALLBACK CoreWindowProc(HWND window, UINT message, WPARAM wp,
+                                         LPARAM lp);
+
+  HRESULT TileRequestCreateDone(winfoundtn::IAsyncOperation<bool>* async,
+                                AsyncStatus status);
+
+  bool osk_visible_notification_received() const {
+    return osk_visible_notification_received_;
+  }
+
+  // Displays the notification.
+  void DisplayNotification(
+      const ToastNotificationHandler::DesktopNotification& notification);
+
+  // Cancels the notification.
+  void CancelNotification(const std::string& notification);
+
+  // Returns true if the notification passed in is valid.
+  bool IsValidNotification(const std::string& notification);
+
+  // Displays a dialog box.
+  void ShowDialogBox(const MetroDialogBox::DialogBoxInfo& dialog_box_info);
+  // Dismisses the dialog box.
+  void DismissDialogBox();
+
+  // Helper function to unsnap the chrome metro app if it is snapped.
+  // Returns S_OK on success.
+  static HRESULT Unsnap();
+
+  // Notification from chrome that a full screen operation is being performed.
+  void SetFullscreen(bool fullscreen);
+
+ private:
+  HRESULT OnActivate(winapp::Core::ICoreApplicationView* view,
+                     winapp::Activation::IActivatedEventArgs* args);
+
+  HRESULT OnSizeChanged(winui::Core::ICoreWindow* sender,
+                        winui::Core::IWindowSizeChangedEventArgs* args);
+
+  HRESULT OnEdgeGestureCompleted(winui::Input::IEdgeGesture* gesture,
+                                 winui::Input::IEdgeGestureEventArgs* args);
+
+  HRESULT OnShareDataRequested(
+      winapp::DataTransfer::IDataTransferManager* data_transfer_mgr,
+      winapp::DataTransfer::IDataRequestedEventArgs* event_args);
+
+  HRESULT OnInputPaneVisible(
+      winui::ViewManagement::IInputPane* input_pane,
+      winui::ViewManagement::IInputPaneVisibilityEventArgs* event_args);
+
+  HRESULT OnInputPaneHiding(
+    winui::ViewManagement::IInputPane* input_pane,
+    winui::ViewManagement::IInputPaneVisibilityEventArgs* event_args);
+
+  HRESULT OnPositionChanged(int x, int y);
+
+  void CheckForOSKActivation();
+
+  HRESULT RegisterInputPaneNotifications();
+
+  void HandleInputPaneVisible(const RECT& osk_rect);
+  void HandleInputPaneHidden(const RECT& osk_rect);
+
+  mswr::ComPtr<winui::Core::ICoreWindow> window_;
+  mswr::ComPtr<winapp::Core::ICoreApplicationView> view_;
+  EventRegistrationToken activated_token_;
+  EventRegistrationToken edgeevent_token_;
+  EventRegistrationToken sizechange_token_;
+  EventRegistrationToken share_data_requested_token_;
+  EventRegistrationToken input_pane_visible_token_;
+  EventRegistrationToken input_pane_hiding_token_;
+  EventRegistrationToken app_exit_token_;
+
+  ChromeUrlLaunchHandler url_launch_handler_;
+  metro_driver::DevicesHandler devices_handler_;
+  SettingsHandler settings_handler_;
+  mswr::ComPtr<winui::ViewManagement::IInputPane> input_pane_;
+  mswr::ComPtr<winui::ViewManagement::IApplicationViewStatics> app_view_;
+
+  bool osk_visible_notification_received_;
+
+  // map of notification id to the ToastNotificationHandler instance.
+  typedef std::map<std::string, scoped_ptr<ToastNotificationHandler> >
+      NotificationMap;
+  NotificationMap notification_map_;
+
+  // Synchronizes access to the notification_map_ member.
+  base::Lock notification_lock_;
+
+  // If the OSK covers the input area we scroll the window by the height of the
+  // OSK + an additional offset. This member holds this offset. Set to 0 if the
+  // window was not scrolled.
+  int osk_offset_adjustment_;
+
+  MetroDialogBox dialog_box_;
+};
+
+class ChromeAppViewFactory
+    : public mswr::RuntimeClass<winapp::Core::IFrameworkViewSource> {
+ public:
+  ChromeAppViewFactory(winapp::Core::ICoreApplication* icore_app,
+                       LPTHREAD_START_ROUTINE host_main,
+                       void* host_context);
+  IFACEMETHOD(CreateView)(winapp::Core::IFrameworkView** view);
+};
+
+// This function is exported by chrome.exe.
+typedef int (__cdecl *BreakpadExceptionHandler)(EXCEPTION_POINTERS* info);
+
+// Global information used across the metro driver.
+struct Globals {
+  LPTHREAD_START_ROUTINE host_main;
+  void* host_context;
+  HWND core_window;
+  // The pair below contains the HWND and a bool which indicates whether the
+  // window was displaced to ensure that the focused region is visible when
+  // the OSK is displayed.
+  std::list<std::pair<HWND, bool> > host_windows;
+  HANDLE host_thread;
+  DWORD main_thread_id;
+  ChromeAppView* view;
+  WNDPROC g_core_proc;
+  string16 navigation_url;
+  string16 search_string;
+  winapp::Activation::ApplicationExecutionState previous_state;
+  winapp::Activation::ActivationKind initial_activation_kind;
+  bool is_initial_activation;
+  // This message loop lives in the app view's thread. Some operations have
+  // to be initiated from that thread, notably spawning file pickers.
+  base::MessageLoopProxy* appview_msg_loop;
+  winapp::Core::ICoreApplicationExit* app_exit;
+  BreakpadExceptionHandler breakpad_exception_handler;
+  string16 metro_command_line_switches;
+};
+
+extern Globals globals;
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_CHROME_APP_VIEW_H_
diff --git a/win8/metro_driver/chrome_url_launch_handler.cc b/win8/metro_driver/chrome_url_launch_handler.cc
new file mode 100644
index 0000000..866bccc
--- /dev/null
+++ b/win8/metro_driver/chrome_url_launch_handler.cc
@@ -0,0 +1,201 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "chrome_url_launch_handler.h"
+#include "chrome_app_view.h"
+
+#include <assert.h>
+#include <shellapi.h>
+#include <shlobj.h>
+#include <string>
+
+#include "base/string_tokenizer.h"
+
+#include "winrt_utils.h"
+
+typedef winfoundtn::ITypedEventHandler<
+    winapp::Search::SearchPane*,
+    winapp::Search::SearchPaneQuerySubmittedEventArgs*> QuerySubmittedHandler;
+
+ChromeUrlLaunchHandler::ChromeUrlLaunchHandler() {
+  globals.is_initial_activation = true;
+  globals.initial_activation_kind = winapp::Activation::ActivationKind_Launch;
+  DVLOG(1) << __FUNCTION__;
+}
+
+// TODO(ananta)
+// Remove this once we consolidate metro driver with chrome.
+const wchar_t kMetroNavigationAndSearchMessage[] =
+    L"CHROME_METRO_NAV_SEARCH_REQUEST";
+
+ChromeUrlLaunchHandler::~ChromeUrlLaunchHandler() {
+  DVLOG(1) << __FUNCTION__;
+  search_pane_->remove_QuerySubmitted(query_submitted_token_);
+}
+
+HRESULT ChromeUrlLaunchHandler::Initialize() {
+  mswr::ComPtr<winapp::Search::ISearchPaneStatics> search_pane_statics;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_ApplicationModel_Search_SearchPane,
+      search_pane_statics.GetAddressOf());
+  CheckHR(hr, "Failed to activate ISearchPaneStatics");
+
+  hr = search_pane_statics->GetForCurrentView(&search_pane_);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to get search pane for current view";
+    return hr;
+  }
+
+  hr = search_pane_->add_QuerySubmitted(mswr::Callback<QuerySubmittedHandler>(
+      this,
+      &ChromeUrlLaunchHandler::OnQuerySubmitted).Get(),
+      &query_submitted_token_);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to register for Query Submitted event";
+    return hr;
+  }
+  return hr;
+}
+
+HRESULT ChromeUrlLaunchHandler::OnQuerySubmitted(
+    winapp::Search::ISearchPane* search_pane,
+    winapp::Search::ISearchPaneQuerySubmittedEventArgs* args) {
+  DVLOG(1) << "OnQuerySubmitted";
+  HandleSearchRequest(args);
+  return S_OK;
+}
+
+template<class T>
+void ChromeUrlLaunchHandler::HandleSearchRequest(T* args) {
+  DVLOG(1) << __FUNCTION__;
+  mswrw::HString search_string;
+  args->get_QueryText(search_string.GetAddressOf());
+  string16 search_text(MakeStdWString(search_string.Get()));
+  globals.search_string = search_text;
+  DVLOG(1) << search_text.c_str();
+  // If this is the initial activation then we wait for Chrome to initiate the
+  // navigation. In all other cases navigate right away.
+  if (!globals.is_initial_activation)
+    InitiateNavigationOrSearchRequest(NULL, globals.search_string.c_str());
+}
+
+void ChromeUrlLaunchHandler::HandleProtocolLaunch(
+    winapp::Activation::IProtocolActivatedEventArgs* args) {
+  DVLOG(1) << __FUNCTION__;
+  mswr::ComPtr<winfoundtn::IUriRuntimeClass> uri;
+  args->get_Uri(&uri);
+  mswrw::HString url;
+  uri->get_AbsoluteUri(url.GetAddressOf());
+  string16 actual_url(MakeStdWString(url.Get()));
+  globals.navigation_url = actual_url;
+
+  // If this is the initial activation then we wait for Chrome to initiate the
+  // navigation. In all other cases navigate right away.
+  if (!globals.is_initial_activation)
+    InitiateNavigationOrSearchRequest(globals.navigation_url.c_str(), 0);
+}
+
+// The LaunchArgs are in a semi-color separated key_name=key_value list. At
+// the moment the only key_name understaood is "url".
+string16 ChromeUrlLaunchHandler::GetUrlFromLaunchArgs(
+    const string16& launch_args) {
+  WStringTokenizer tokenizer(launch_args, L";=");
+  bool next_is_url = false;
+  while (tokenizer.GetNext()) {
+    if (next_is_url)
+      return tokenizer.token();
+    if (tokenizer.token() == L"url")
+      next_is_url = true;
+  }
+  if (launch_args == L"opennewwindow") {
+    DVLOG(1) << "Returning new tab url";
+    return L"chrome://newtab";
+  }
+  return string16();
+}
+
+void ChromeUrlLaunchHandler::HandleLaunch(
+    winapp::Activation::ILaunchActivatedEventArgs* args) {
+  mswrw::HString launch_args;
+  args->get_Arguments(launch_args.GetAddressOf());
+  string16 actual_launch_args(MakeStdWString(launch_args.Get()));
+  globals.navigation_url = GetUrlFromLaunchArgs(actual_launch_args);
+  DVLOG(1) << __FUNCTION__ << ", launch_args=" << actual_launch_args
+           << ", url=" << globals.navigation_url
+           << ", is_initial_activation=" << globals.is_initial_activation;
+
+  // If this is the initial launch then we wait for Chrome to initiate the
+  // navigation. In all other cases navigate right away.
+  if (!globals.is_initial_activation)
+    InitiateNavigationOrSearchRequest(globals.navigation_url.c_str(), 0);
+}
+
+void ChromeUrlLaunchHandler::Activate(
+    winapp::Activation::IActivatedEventArgs* args) {
+  winapp::Activation::ActivationKind activation_kind;
+  CheckHR(args->get_Kind(&activation_kind));
+
+  DVLOG(1) << __FUNCTION__ << ", activation_kind=" << activation_kind;
+
+  if (globals.is_initial_activation)
+    globals.initial_activation_kind = activation_kind;
+
+  if (activation_kind == winapp::Activation::ActivationKind_Launch) {
+    mswr::ComPtr<winapp::Activation::ILaunchActivatedEventArgs> launch_args;
+    if (args->QueryInterface(winapp::Activation::IID_ILaunchActivatedEventArgs,
+                             &launch_args) == S_OK) {
+      DVLOG(1) << "Activate: ActivationKind_Launch";
+      HandleLaunch(launch_args.Get());
+    }
+  } else if (activation_kind ==
+             winapp::Activation::ActivationKind_Search) {
+    mswr::ComPtr<winapp::Activation::ISearchActivatedEventArgs> search_args;
+    if (args->QueryInterface(winapp::Activation::IID_ISearchActivatedEventArgs,
+                             &search_args) == S_OK) {
+      DVLOG(1) << "Activate: ActivationKind_Search";
+      HandleSearchRequest(search_args.Get());
+    }
+  } else if (activation_kind ==
+             winapp::Activation::ActivationKind_Protocol) {
+    mswr::ComPtr<winapp::Activation::IProtocolActivatedEventArgs>
+        protocol_args;
+    if (args->QueryInterface(
+            winapp::Activation::IID_IProtocolActivatedEventArgs,
+            &protocol_args) == S_OK) {
+      DVLOG(1) << "Activate: ActivationKind_Protocol";
+      HandleProtocolLaunch(protocol_args.Get());
+    }
+  } else {
+    DVLOG(1) << "Activate: Unhandled mode: " << activation_kind;
+  }
+}
+
+void ChromeUrlLaunchHandler::InitiateNavigationOrSearchRequest(
+    const wchar_t* url, const wchar_t* search_string) {
+  DVLOG(1) << __FUNCTION__;
+  if (!url && !search_string) {
+    NOTREACHED();
+    return;
+  }
+
+  DVLOG(1) << (url ? url : L"NULL url");
+  DVLOG(1) << (search_string ? search_string : L"NULL search string");
+
+  // Custom registered message to navigate or search in chrome. WPARAM
+  // points to the URL and LPARAM contains the search string. They are
+  // mutually exclusive.
+  static const UINT navigation_search_message =
+      RegisterWindowMessage(kMetroNavigationAndSearchMessage);
+
+  if (url) {
+    VLOG(1) << "Posting url:" << url;
+    PostMessage(globals.host_windows.front().first, navigation_search_message,
+                reinterpret_cast<WPARAM>(url), 0);
+  } else {
+    VLOG(1) << "Posting search string:" << search_string;
+    PostMessage(globals.host_windows.front().first, navigation_search_message,
+                0, reinterpret_cast<LPARAM>(search_string));
+  }
+}
diff --git a/win8/metro_driver/chrome_url_launch_handler.h b/win8/metro_driver/chrome_url_launch_handler.h
new file mode 100644
index 0000000..d8c7ed0
--- /dev/null
+++ b/win8/metro_driver/chrome_url_launch_handler.h
@@ -0,0 +1,58 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_CHROME_URL_LAUNCH_HANDLER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_CHROME_URL_LAUNCH_HANDLER_H_
+
+#include <string>
+#include <windows.applicationmodel.core.h>
+#include <Windows.applicationModel.search.h>
+#include <windows.ui.core.h>
+
+#include "winrt_utils.h"
+
+// This class handles the various flavors of URL launches in metro, i.e.
+// via the search charm, via a url being navigated from a metro app, etc.
+class ChromeUrlLaunchHandler {
+ public:
+  ChromeUrlLaunchHandler();
+  ~ChromeUrlLaunchHandler();
+
+  HRESULT Initialize();
+
+  // If metro chrome was launched due to a URL navigation/search request then
+  // the navigation should be done when the frame window is initialized. This
+  // function is called to complete the pending navigation when we receive a
+  // notification from chrome that the frame window is initialized.
+  void PerformPendingNavigation();
+
+  void Activate(winapp::Activation::IActivatedEventArgs* args);
+
+ private:
+  // Invoked when we receive search notifications in metro chrome.
+  template<class T> void HandleSearchRequest(T* args);
+
+  HRESULT OnQuerySubmitted(
+      winapp::Search::ISearchPane* search_pane,
+      winapp::Search::ISearchPaneQuerySubmittedEventArgs* args);
+
+  string16 GetUrlFromLaunchArgs(const string16& launch_args);
+
+  // Invoked when a url is navigated from a metro app or in the metro
+  // shelf.
+  void HandleProtocolLaunch(
+      winapp::Activation::IProtocolActivatedEventArgs* args);
+
+  // Invoked when the app is launched normally
+  void HandleLaunch(winapp::Activation::ILaunchActivatedEventArgs* args);
+
+  // Helper function to initiate a navigation or search request in chrome.
+  void InitiateNavigationOrSearchRequest(const wchar_t* url,
+                                         const wchar_t* search_string);
+
+  Microsoft::WRL::ComPtr<winapp::Search::ISearchPane> search_pane_;
+  EventRegistrationToken query_submitted_token_;
+};
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_CHROME_URL_LAUNCH_HANDLER_H_
diff --git a/win8/metro_driver/devices_handler.cc b/win8/metro_driver/devices_handler.cc
new file mode 100644
index 0000000..20fd413
--- /dev/null
+++ b/win8/metro_driver/devices_handler.cc
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "win8/metro_driver/devices_handler.h"
+
+#include "base/logging.h"
+
+namespace metro_driver {
+
+DevicesHandler::DevicesHandler() {
+}
+
+DevicesHandler::~DevicesHandler() {
+}
+
+HRESULT DevicesHandler::Initialize(winui::Core::ICoreWindow* window) {
+  HRESULT hr = print_handler_.Initialize(window);
+  return hr;
+}
+
+}  // namespace metro_driver
diff --git a/win8/metro_driver/devices_handler.h b/win8/metro_driver/devices_handler.h
new file mode 100644
index 0000000..fdb2226
--- /dev/null
+++ b/win8/metro_driver/devices_handler.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_
+
+#include <windows.ui.core.h>
+
+#include "base/basictypes.h"
+#include "win8/metro_driver/print_handler.h"
+
+namespace metro_driver {
+
+// This class handles the devices charm.
+class DevicesHandler {
+ public:
+  DevicesHandler();
+  ~DevicesHandler();
+
+  HRESULT Initialize(winui::Core::ICoreWindow* window);
+
+ private:
+  PrintHandler print_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevicesHandler);
+};
+
+}  // namespace metro_driver
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_
diff --git a/win8/metro_driver/file_picker.cc b/win8/metro_driver/file_picker.cc
new file mode 100644
index 0000000..4977be6
--- /dev/null
+++ b/win8/metro_driver/file_picker.cc
@@ -0,0 +1,618 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "win8/metro_driver/file_picker.h"
+
+#include <windows.storage.pickers.h>
+
+#include "base/bind.h"
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "base/string_util.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/metro.h"
+#include "win8/metro_driver/chrome_app_view.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+namespace {
+
+namespace winstorage = ABI::Windows::Storage;
+typedef winfoundtn::Collections::IVector<HSTRING> StringVectorItf;
+
+// TODO(siggi): Complete this implementation and move it to a common place.
+class StringVectorImpl : public mswr::RuntimeClass<StringVectorItf> {
+ public:
+  ~StringVectorImpl() {
+    std::for_each(strings_.begin(), strings_.end(), ::WindowsDeleteString);
+  }
+
+  HRESULT RuntimeClassInitialize(const std::vector<string16>& list) {
+    for (size_t i = 0; i < list.size(); ++i)
+      strings_.push_back(MakeHString(list[i]));
+
+    return S_OK;
+  }
+
+  // IVector<HSTRING> implementation.
+  STDMETHOD(GetAt)(unsigned index, HSTRING* item) {
+    if (index >= strings_.size())
+      return E_INVALIDARG;
+
+    return ::WindowsDuplicateString(strings_[index], item);
+  }
+  STDMETHOD(get_Size)(unsigned *size) {
+    *size = strings_.size();
+    return S_OK;
+  }
+  STDMETHOD(GetView)(winfoundtn::Collections::IVectorView<HSTRING> **view) {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(IndexOf)(HSTRING value, unsigned *index, boolean *found) {
+    return E_NOTIMPL;
+  }
+
+  // write methods
+  STDMETHOD(SetAt)(unsigned index, HSTRING item) {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(InsertAt)(unsigned index, HSTRING item) {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(RemoveAt)(unsigned index) {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(Append)(HSTRING item) {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(RemoveAtEnd)() {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(Clear)() {
+    return E_NOTIMPL;
+  }
+
+ private:
+  std::vector<HSTRING> strings_;
+};
+
+class FilePickerSessionBase {
+ public:
+  // Creates a file picker for open_file_name.
+  explicit FilePickerSessionBase(OPENFILENAME* open_file_name);
+
+  // Runs the picker, returns true on success.
+  bool Run();
+
+ protected:
+  // Creates, configures and starts a file picker.
+  // If the HRESULT returned is a failure code the file picker has not started,
+  // so no callbacks should be expected.
+  virtual HRESULT StartFilePicker() = 0;
+
+  // The parameters to our picker.
+  OPENFILENAME* open_file_name_;
+  // The event Run waits on.
+  base::WaitableEvent event_;
+  // True iff a file picker has successfully finished.
+  bool success_;
+
+ private:
+  // Initiate a file picker, must be called on the metro dispatcher's thread.
+  void DoFilePicker();
+
+  DISALLOW_COPY_AND_ASSIGN(FilePickerSessionBase);
+};
+
+class OpenFilePickerSession : public FilePickerSessionBase {
+ public:
+  explicit OpenFilePickerSession(OPENFILENAME* open_file_name);
+
+ private:
+  virtual HRESULT StartFilePicker() OVERRIDE;
+
+  typedef winfoundtn::IAsyncOperation<winstorage::StorageFile*>
+      SingleFileAsyncOp;
+  typedef winfoundtn::Collections::IVectorView<
+      winstorage::StorageFile*> StorageFileVectorCollection;
+  typedef winfoundtn::IAsyncOperation<StorageFileVectorCollection*>
+      MultiFileAsyncOp;
+
+  // Called asynchronously when a single file picker is done.
+  HRESULT SinglePickerDone(SingleFileAsyncOp* async, AsyncStatus status);
+
+  // Called asynchronously when a multi file picker is done.
+  HRESULT MultiPickerDone(MultiFileAsyncOp* async, AsyncStatus status);
+
+  // Composes a multi-file result string suitable for returning to a
+  // from a storage file collection.
+  static HRESULT ComposeMultiFileResult(StorageFileVectorCollection* files,
+                                        string16* result);
+ private:
+  DISALLOW_COPY_AND_ASSIGN(OpenFilePickerSession);
+};
+
+class SaveFilePickerSession : public FilePickerSessionBase {
+ public:
+  explicit SaveFilePickerSession(OPENFILENAME* open_file_name);
+
+ private:
+  virtual HRESULT StartFilePicker() OVERRIDE;
+
+  typedef winfoundtn::IAsyncOperation<winstorage::StorageFile*>
+      SaveFileAsyncOp;
+
+  // Called asynchronously when the save file picker is done.
+  HRESULT FilePickerDone(SaveFileAsyncOp* async, AsyncStatus status);
+};
+
+FilePickerSessionBase::FilePickerSessionBase(OPENFILENAME* open_file_name)
+    : open_file_name_(open_file_name),
+      event_(true, false),
+      success_(false) {
+}
+
+bool FilePickerSessionBase::Run() {
+  DCHECK(globals.appview_msg_loop != NULL);
+
+  // Post the picker request over to the metro thread.
+  bool posted = globals.appview_msg_loop->PostTask(FROM_HERE,
+      base::Bind(&FilePickerSessionBase::DoFilePicker, base::Unretained(this)));
+  if (!posted)
+    return false;
+
+  // Wait for the file picker to complete.
+  event_.Wait();
+
+  return success_;
+}
+
+void FilePickerSessionBase::DoFilePicker() {
+  // The file picker will fail if spawned from a snapped application,
+  // so let's attempt to unsnap first if we're in that state.
+  HRESULT hr = ChromeAppView::Unsnap();
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to unsnap for file picker, error 0x" << hr;
+  }
+
+  if (SUCCEEDED(hr))
+    hr = StartFilePicker();
+
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to start file picker, error 0x"
+               << std::hex << hr;
+
+    event_.Signal();
+  }
+}
+
+OpenFilePickerSession::OpenFilePickerSession(OPENFILENAME* open_file_name)
+    : FilePickerSessionBase(open_file_name) {
+}
+
+HRESULT OpenFilePickerSession::SinglePickerDone(SingleFileAsyncOp* async,
+                                                AsyncStatus status) {
+  if (status == Completed) {
+    mswr::ComPtr<winstorage::IStorageFile> file;
+    HRESULT hr = async->GetResults(file.GetAddressOf());
+
+    if (file) {
+      mswr::ComPtr<winstorage::IStorageItem> storage_item;
+      if (SUCCEEDED(hr))
+        hr = file.As(&storage_item);
+
+      mswrw::HString file_path;
+      if (SUCCEEDED(hr))
+        hr = storage_item->get_Path(file_path.GetAddressOf());
+
+      if (SUCCEEDED(hr)) {
+        size_t path_len = 0;
+        const wchar_t* path_str =
+            ::WindowsGetStringRawBuffer(file_path.Get(), &path_len);
+
+        // If the selected file name is longer than the supplied buffer,
+        // we return false as per GetOpenFileName documentation.
+        if (path_len < open_file_name_->nMaxFile) {
+          base::wcslcpy(open_file_name_->lpstrFile,
+                        path_str,
+                        open_file_name_->nMaxFile);
+          success_ = true;
+        }
+      }
+    } else {
+      LOG(ERROR) << "NULL IStorageItem";
+    }
+  } else {
+    LOG(ERROR) << "Unexpected async status " << status;
+  }
+
+  event_.Signal();
+
+  return S_OK;
+}
+
+HRESULT OpenFilePickerSession::MultiPickerDone(MultiFileAsyncOp* async,
+                                                 AsyncStatus status) {
+  if (status == Completed) {
+    mswr::ComPtr<StorageFileVectorCollection> files;
+    HRESULT hr = async->GetResults(files.GetAddressOf());
+
+    if (files) {
+      string16 result;
+      if (SUCCEEDED(hr))
+        hr = ComposeMultiFileResult(files.Get(), &result);
+
+      if (SUCCEEDED(hr)) {
+        if (result.size() + 1 < open_file_name_->nMaxFile) {
+          // Because the result has embedded nulls, we must memcpy.
+          memcpy(open_file_name_->lpstrFile,
+                 result.c_str(),
+                 (result.size() + 1) * sizeof(result[0]));
+          success_ = true;
+        }
+      }
+    } else {
+      LOG(ERROR) << "NULL StorageFileVectorCollection";
+    }
+  } else {
+    LOG(ERROR) << "Unexpected async status " << status;
+  }
+
+  event_.Signal();
+
+  return S_OK;
+}
+
+HRESULT OpenFilePickerSession::StartFilePicker() {
+  DCHECK(globals.appview_msg_loop->BelongsToCurrentThread());
+  DCHECK(open_file_name_ != NULL);
+
+  mswrw::HStringReference class_name(
+      RuntimeClass_Windows_Storage_Pickers_FileOpenPicker);
+
+  // Create the file picker.
+  mswr::ComPtr<winstorage::Pickers::IFileOpenPicker> picker;
+  HRESULT hr = ::Windows::Foundation::ActivateInstance(
+      class_name.Get(), picker.GetAddressOf());
+  CheckHR(hr);
+
+  // Set the file type filter
+  mswr::ComPtr<winfoundtn::Collections::IVector<HSTRING>> filter;
+  hr = picker->get_FileTypeFilter(filter.GetAddressOf());
+  if (FAILED(hr))
+    return hr;
+
+  if (open_file_name_->lpstrFilter == NULL) {
+    hr = filter->Append(mswrw::HStringReference(L"*").Get());
+    if (FAILED(hr))
+      return hr;
+  } else {
+    // The filter is a concatenation of zero terminated string pairs,
+    // where each pair is {description, extension}. The concatenation ends
+    // with a zero length string - e.g. a double zero terminator.
+    const wchar_t* walk = open_file_name_->lpstrFilter;
+    while (*walk != L'\0') {
+      // Walk past the description.
+      walk += wcslen(walk) + 1;
+
+      // We should have an extension, but bail on malformed filters.
+      if (*walk == L'\0')
+        break;
+
+      // There can be a single extension, or a list of semicolon-separated ones.
+      std::vector<string16> extensions_win32_style;
+      size_t extension_count = Tokenize(walk, L";", &extensions_win32_style);
+      DCHECK_EQ(extension_count, extensions_win32_style.size());
+
+      // Metro wants suffixes only, not patterns.
+      mswrw::HString extension;
+      std::vector<string16> extensions;
+      for (size_t i = 0; i < extensions_win32_style.size(); ++i) {
+        if (extensions_win32_style[i] == L"*.*") {
+          // The wildcard filter is "*" for Metro. The string "*.*" produces
+          // an "invalid parameter" error.
+          hr = extension.Set(L"*");
+        } else {
+          // Metro wants suffixes only, not patterns.
+          string16 ext = FilePath(extensions_win32_style[i]).Extension();
+          if ((ext.size() < 2) ||
+              (ext.find_first_of(L"*?") != string16::npos)) {
+            continue;
+          }
+          hr = extension.Set(ext.c_str());
+        }
+        if (SUCCEEDED(hr))
+          hr = filter->Append(extension.Get());
+        if (FAILED(hr))
+          return hr;
+      }
+
+      // Walk past the extension.
+      walk += wcslen(walk) + 1;
+    }
+  }
+
+  // Spin up a single or multi picker as appropriate.
+  if (open_file_name_->Flags & OFN_ALLOWMULTISELECT) {
+    mswr::ComPtr<MultiFileAsyncOp> completion;
+    hr = picker->PickMultipleFilesAsync(&completion);
+    if (FAILED(hr))
+      return hr;
+
+    // Create the callback method.
+    typedef winfoundtn::IAsyncOperationCompletedHandler<
+        StorageFileVectorCollection*> HandlerDoneType;
+    mswr::ComPtr<HandlerDoneType> handler(mswr::Callback<HandlerDoneType>(
+        this, &OpenFilePickerSession::MultiPickerDone));
+    DCHECK(handler.Get() != NULL);
+    hr = completion->put_Completed(handler.Get());
+
+    return hr;
+  } else {
+    mswr::ComPtr<SingleFileAsyncOp> completion;
+    hr = picker->PickSingleFileAsync(&completion);
+    if (FAILED(hr))
+      return hr;
+
+    // Create the callback method.
+    typedef winfoundtn::IAsyncOperationCompletedHandler<
+        winstorage::StorageFile*> HandlerDoneType;
+    mswr::ComPtr<HandlerDoneType> handler(mswr::Callback<HandlerDoneType>(
+        this, &OpenFilePickerSession::SinglePickerDone));
+    DCHECK(handler.Get() != NULL);
+    hr = completion->put_Completed(handler.Get());
+
+    return hr;
+  }
+}
+
+HRESULT OpenFilePickerSession::ComposeMultiFileResult(
+    StorageFileVectorCollection* files, string16* result) {
+  DCHECK(files != NULL);
+  DCHECK(result != NULL);
+
+  // Empty the output string.
+  result->clear();
+
+  size_t num_files = 0;
+  HRESULT hr = files->get_Size(&num_files);
+  if (FAILED(hr))
+    return hr;
+
+  // Make sure we return an error on an empty collection.
+  if (num_files == 0) {
+    DLOG(ERROR) << "Empty collection on input.";
+    return E_UNEXPECTED;
+  }
+
+  // This stores the base path that should be the parent of all the files.
+  FilePath base_path;
+
+  // Iterate through the collection and append the file paths to the result.
+  for (size_t i = 0; i < num_files; ++i) {
+    mswr::ComPtr<winstorage::IStorageFile> file;
+    hr = files->GetAt(i, file.GetAddressOf());
+    if (FAILED(hr))
+      return hr;
+
+    mswr::ComPtr<winstorage::IStorageItem> storage_item;
+    hr = file.As(&storage_item);
+    if (FAILED(hr))
+      return hr;
+
+    mswrw::HString file_path_str;
+    hr = storage_item->get_Path(file_path_str.GetAddressOf());
+    if (FAILED(hr))
+      return hr;
+
+    FilePath file_path(MakeStdWString(file_path_str.Get()));
+    if (base_path.empty()) {
+      DCHECK(result->empty());
+      base_path = file_path.DirName();
+
+      // Append the path, including the terminating zero.
+      // We do this only for the first file.
+      result->append(base_path.value().c_str(), base_path.value().size() + 1);
+    }
+    DCHECK(!result->empty());
+    DCHECK(!base_path.empty());
+    DCHECK(base_path == file_path.DirName());
+
+    // Append the base name, including the terminating zero.
+    FilePath base_name = file_path.BaseName();
+    result->append(base_name.value().c_str(), base_name.value().size() + 1);
+  }
+
+  DCHECK(!result->empty());
+
+  return S_OK;
+}
+
+SaveFilePickerSession::SaveFilePickerSession(OPENFILENAME* open_file_name)
+    : FilePickerSessionBase(open_file_name) {
+}
+
+HRESULT SaveFilePickerSession::StartFilePicker() {
+  DCHECK(globals.appview_msg_loop->BelongsToCurrentThread());
+  DCHECK(open_file_name_ != NULL);
+
+  mswrw::HStringReference class_name(
+      RuntimeClass_Windows_Storage_Pickers_FileSavePicker);
+
+  // Create the file picker.
+  mswr::ComPtr<winstorage::Pickers::IFileSavePicker> picker;
+  HRESULT hr = ::Windows::Foundation::ActivateInstance(
+      class_name.Get(), picker.GetAddressOf());
+  CheckHR(hr);
+
+  typedef winfoundtn::Collections::IMap<HSTRING, StringVectorItf*>
+      StringVectorMap;
+  mswr::ComPtr<StringVectorMap> choices;
+  hr = picker->get_FileTypeChoices(choices.GetAddressOf());
+  if (FAILED(hr))
+    return hr;
+
+  if (open_file_name_->lpstrFilter) {
+    // The filter is a concatenation of zero terminated string pairs,
+    // where each pair is {description, extension list}. The concatenation ends
+    // with a zero length string - e.g. a double zero terminator.
+    const wchar_t* walk = open_file_name_->lpstrFilter;
+    while (*walk != L'\0') {
+      mswrw::HString description;
+      hr = description.Set(walk);
+      if (FAILED(hr))
+        return hr;
+
+      // Walk past the description.
+      walk += wcslen(walk) + 1;
+
+      // We should have an extension, but bail on malformed filters.
+      if (*walk == L'\0')
+        break;
+
+      // There can be a single extension, or a list of semicolon-separated ones.
+      std::vector<string16> extensions_win32_style;
+      size_t extension_count = Tokenize(walk, L";", &extensions_win32_style);
+      DCHECK_EQ(extension_count, extensions_win32_style.size());
+
+      // Metro wants suffixes only, not patterns.  Also, metro does not support
+      // the all files ("*") pattern in the save picker.
+      std::vector<string16> extensions;
+      for (size_t i = 0; i < extensions_win32_style.size(); ++i) {
+        string16 ext = FilePath(extensions_win32_style[i]).Extension();
+        if ((ext.size() < 2) ||
+            (ext.find_first_of(L"*?") != string16::npos))
+          continue;
+        extensions.push_back(ext);
+      }
+
+      if (!extensions.empty()) {
+        // Convert to a Metro collection class.
+        mswr::ComPtr<StringVectorItf> list;
+        hr = mswr::MakeAndInitialize<StringVectorImpl>(
+            list.GetAddressOf(), extensions);
+        if (FAILED(hr))
+          return hr;
+
+        // Finally set the filter.
+        boolean replaced = FALSE;
+        hr = choices->Insert(description.Get(), list.Get(), &replaced);
+        if (FAILED(hr))
+          return hr;
+        DCHECK_EQ(FALSE, replaced);
+      }
+
+      // Walk past the extension(s).
+      walk += wcslen(walk) + 1;
+    }
+  }
+
+  // The save picker requires at least one choice.  Callers are strongly advised
+  // to provide sensible choices.  If none were given, fallback to .dat.
+  uint32 num_choices = 0;
+  hr = choices->get_Size(&num_choices);
+  if (FAILED(hr))
+    return hr;
+
+  if (num_choices == 0) {
+    mswrw::HString description;
+    // TODO(grt): Get a properly translated string.  This can't be done from
+    // within metro_driver.  Consider preprocessing the filter list in Chrome
+    // land to ensure it has this entry if all others are patterns.  In that
+    // case, this whole block of code can be removed.
+    hr = description.Set(L"Data File");
+    if (FAILED(hr))
+      return hr;
+
+    mswr::ComPtr<StringVectorItf> list;
+    hr = mswr::MakeAndInitialize<StringVectorImpl>(
+        list.GetAddressOf(), std::vector<string16>(1, L".dat"));
+    if (FAILED(hr))
+      return hr;
+
+    boolean replaced = FALSE;
+    hr = choices->Insert(description.Get(), list.Get(), &replaced);
+    if (FAILED(hr))
+      return hr;
+    DCHECK_EQ(FALSE, replaced);
+  }
+
+  if (open_file_name_->lpstrFile != NULL) {
+    hr = picker->put_SuggestedFileName(
+        mswrw::HStringReference(
+            const_cast<const wchar_t*>(open_file_name_->lpstrFile)).Get());
+    if (FAILED(hr))
+      return hr;
+  }
+
+  mswr::ComPtr<SaveFileAsyncOp> completion;
+  hr = picker->PickSaveFileAsync(&completion);
+  if (FAILED(hr))
+    return hr;
+
+  // Create the callback method.
+  typedef winfoundtn::IAsyncOperationCompletedHandler<
+      winstorage::StorageFile*> HandlerDoneType;
+  mswr::ComPtr<HandlerDoneType> handler(mswr::Callback<HandlerDoneType>(
+      this, &SaveFilePickerSession::FilePickerDone));
+  DCHECK(handler.Get() != NULL);
+  hr = completion->put_Completed(handler.Get());
+
+  return hr;
+}
+
+HRESULT SaveFilePickerSession::FilePickerDone(SaveFileAsyncOp* async,
+                                              AsyncStatus status) {
+  if (status == Completed) {
+    mswr::ComPtr<winstorage::IStorageFile> file;
+    HRESULT hr = async->GetResults(file.GetAddressOf());
+
+    if (file) {
+      mswr::ComPtr<winstorage::IStorageItem> storage_item;
+      if (SUCCEEDED(hr))
+        hr = file.As(&storage_item);
+
+      mswrw::HString file_path;
+      if (SUCCEEDED(hr))
+        hr = storage_item->get_Path(file_path.GetAddressOf());
+
+      if (SUCCEEDED(hr)) {
+        string16 path_str = MakeStdWString(file_path.Get());
+
+        // If the selected file name is longer than the supplied buffer,
+        // we return false as per GetOpenFileName documentation.
+        if (path_str.size() < open_file_name_->nMaxFile) {
+          base::wcslcpy(open_file_name_->lpstrFile,
+                        path_str.c_str(),
+                        open_file_name_->nMaxFile);
+          success_ = true;
+        }
+      }
+    } else {
+      LOG(ERROR) << "NULL IStorageItem";
+    }
+  } else {
+    LOG(ERROR) << "Unexpected async status " << status;
+  }
+
+  event_.Signal();
+
+  return S_OK;
+}
+
+}  // namespace
+
+BOOL MetroGetOpenFileName(OPENFILENAME* open_file_name) {
+  OpenFilePickerSession session(open_file_name);
+
+  return session.Run();
+}
+
+BOOL MetroGetSaveFileName(OPENFILENAME* open_file_name) {
+  SaveFilePickerSession session(open_file_name);
+
+  return session.Run();
+}
diff --git a/win8/metro_driver/file_picker.h b/win8/metro_driver/file_picker.h
new file mode 100644
index 0000000..ef56cb3
--- /dev/null
+++ b/win8/metro_driver/file_picker.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
+
+#include <commdlg.h>
+
+// This function behaves similarly to GetOpenFileName, except it uses a
+// Metro file picker to pick a single or multiple file names.
+extern "C" __declspec(dllexport)
+BOOL MetroGetOpenFileName(OPENFILENAME* open_file_name);
+
+extern "C" __declspec(dllexport)
+BOOL MetroGetSaveFileName(OPENFILENAME* open_file_name);
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
+
diff --git a/win8/metro_driver/metro_dialog_box.cc b/win8/metro_driver/metro_dialog_box.cc
new file mode 100644
index 0000000..25e7082
--- /dev/null
+++ b/win8/metro_driver/metro_dialog_box.cc
@@ -0,0 +1,160 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/metro_driver/stdafx.h"
+
+#include "win8/metro_driver/chrome_app_view.h"
+#include "win8/metro_driver/metro_dialog_box.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+typedef winfoundtn::Collections::
+    IVector<ABI::Windows::UI::Popups::IUICommand*> WindowsUICommands;
+
+typedef winfoundtn::IAsyncOperation<ABI::Windows::UI::Popups::IUICommand*>
+    AsyncCommandStatus;
+
+MetroDialogBox::MetroDialogBox() {
+  DVLOG(1) << __FUNCTION__;
+  dialog_box_info_.button1_handler = NULL;
+  dialog_box_info_.button2_handler = NULL;
+}
+
+MetroDialogBox::~MetroDialogBox() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+void MetroDialogBox::Show(
+    const DialogBoxInfo& dialog_box_info) {
+  DVLOG(1) << __FUNCTION__;
+
+  // Only one dialog can be displayed at a given time.
+  DCHECK(dialog_box_.Get() == NULL);
+
+  // The message dialog display does not work correctly in snapped mode.
+  mswr::ComPtr<winui::Popups::IMessageDialogFactory> message_dialog_factory;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_Popups_MessageDialog,
+      message_dialog_factory.GetAddressOf());
+  CheckHR(hr, "Failed to activate IMessageDialogFactory");
+
+  mswrw::HString message_title;
+  message_title.Attach(MakeHString(dialog_box_info.title));
+
+  mswrw::HString message_content;
+  message_content.Attach(MakeHString(dialog_box_info.content));
+
+  hr = message_dialog_factory->CreateWithTitle(
+      message_content.Get(),
+      message_title.Get(),
+      dialog_box_.GetAddressOf());
+  CheckHR(hr, "Failed to create message dialog");
+
+  mswr::ComPtr<WindowsUICommands> commands;
+  hr = dialog_box_->get_Commands(commands.GetAddressOf());
+  CheckHR(hr, "Failed to create ui command collection");
+
+  mswr::ComPtr<winui::Popups::IUICommandFactory> ui_command_factory;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_Popups_UICommand,
+      ui_command_factory.GetAddressOf());
+  CheckHR(hr, "Failed to activate IUICommandFactory");
+
+  mswrw::HString label1;
+  label1.Attach(MakeHString(dialog_box_info.button1_label));
+
+  mswr::ComPtr<winui::Popups::IUICommand> label1_command;
+  hr = ui_command_factory->CreateWithHandler(
+      label1.Get(), this, label1_command.GetAddressOf());
+  CheckHR(hr, "Failed to add button1");
+
+  mswrw::HString label2;
+  label2.Attach(MakeHString(dialog_box_info.button2_label));
+
+  mswr::ComPtr<winui::Popups::IUICommand> label2_command;
+  hr = ui_command_factory->CreateWithHandler(label2.Get(), this,
+                                             label2_command.GetAddressOf());
+  CheckHR(hr, "Failed to add button2");
+
+  commands->Append(label1_command.Get());
+  commands->Append(label2_command.Get());
+
+  mswr::ComPtr<AsyncCommandStatus> ret;
+  hr = dialog_box_->ShowAsync(ret.GetAddressOf());
+  CheckHR(hr, "Failed to show dialog");
+
+  dialog_box_info_ = dialog_box_info;
+}
+
+// The dialog box displayed via the MessageDialog interface has the class name
+// 'Shell_Dialog'. The dialog box is top level window. To find it we enumerate
+// all top level windows and compare the class names. If we find a matching
+// window class we compare its process id with ours and return the same.
+BOOL CALLBACK DialogBoxFinder(HWND hwnd, LPARAM lparam) {
+  char classname[MAX_PATH] = {0};
+
+  if (::GetClassNameA(hwnd, classname, ARRAYSIZE(classname))) {
+    if (lstrcmpiA("Shell_Dialog", classname) == 0) {
+      if (GetWindowLong(hwnd, GWL_EXSTYLE) & WS_EX_TOPMOST) {
+        DVLOG(1) << "Found top most dialog box: " << classname;
+        DVLOG(1) << "HWND: " << hwnd;
+        DWORD window_pid = 0;
+        DWORD window_tid = GetWindowThreadProcessId(hwnd, &window_pid);
+        DVLOG(1) << "Window tid: " << window_tid;
+        DVLOG(1) << "Window pid: " << window_pid;
+
+        if (window_pid == ::GetCurrentProcessId()) {
+          HWND* dialog_window = reinterpret_cast<HWND*>(lparam);
+          *dialog_window = hwnd;
+          return FALSE;
+        }
+      }
+    }
+  }
+  return TRUE;
+}
+
+void MetroDialogBox::Dismiss() {
+  DVLOG(1) << __FUNCTION__;
+  if (!dialog_box_)
+    return;
+
+  dialog_box_info_.button1_handler = NULL;
+  dialog_box_info_.button2_handler = NULL;
+  dialog_box_info_.button1_label.clear();
+  dialog_box_info_.button2_label.clear();
+  dialog_box_.Reset();
+
+  // We don't have a good way to dismiss the dialog box. Hack for now is to
+  // find the dialog box class in our process and close it via the WM_CLOSE
+  // message.
+  HWND dialog_box = NULL;
+  ::EnumWindows(&DialogBoxFinder, reinterpret_cast<LPARAM>(&dialog_box));
+  if (::IsWindow(dialog_box))
+    PostMessage(dialog_box, WM_CLOSE, 0, 0);
+}
+
+HRESULT STDMETHODCALLTYPE MetroDialogBox::Invoke(
+    winui::Popups::IUICommand* command) {
+  DVLOG(1) << __FUNCTION__;
+
+  mswrw::HString label;
+  command->get_Label(label.GetAddressOf());
+
+  string16 button_label = MakeStdWString(label.Get());
+  DVLOG(1) << "Clicked button label is : " << button_label;
+  if (button_label == dialog_box_info_.button1_label) {
+    DVLOG(1) << "Button1 clicked";
+    DCHECK(dialog_box_info_.button1_handler);
+    dialog_box_info_.button1_handler();
+  } else if (button_label == dialog_box_info_.button2_label) {
+    DVLOG(1) << "Button2 clicked";
+    DCHECK(dialog_box_info_.button2_handler);
+    dialog_box_info_.button2_handler();
+  }
+  // The dialog box is destroyed once we return from invoke. Go ahead and
+  // dismiss it.
+  Dismiss();
+  return S_OK;
+}
+
diff --git a/win8/metro_driver/metro_dialog_box.h b/win8/metro_driver/metro_dialog_box.h
new file mode 100644
index 0000000..5a6a94d
--- /dev/null
+++ b/win8/metro_driver/metro_dialog_box.h
@@ -0,0 +1,64 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_METRO_DIALOG_BOX_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_METRO_DIALOG_BOX_H_
+
+#include <windows.ui.popups.h>
+#include <string>
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/win/metro.h"
+
+// Provides functionality to display a dialog box
+class MetroDialogBox : public winui::Popups::IUICommandInvokedHandler {
+ public:
+  struct DialogBoxInfo {
+    string16 title;
+    string16 content;
+    string16 button1_label;
+    string16 button2_label;
+    base::win::MetroDialogButtonPressedHandler button1_handler;
+    base::win::MetroDialogButtonPressedHandler button2_handler;
+  };
+
+  MetroDialogBox();
+  ~MetroDialogBox();
+
+  // Displays the dialog box.
+  void Show(const DialogBoxInfo& dialog_box_info);
+
+  // Dismisses the dialog box.
+  void Dismiss();
+
+  // IUICommandInvokedHandler implementation.
+  // Dummy implementation of IUnknown. This is fine as the lifetime of this
+  // class is tied to the lifetime of the ChromeAppView instance.
+  virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** object) {
+    DVLOG(1) << __FUNCTION__;
+    CHECK(false);
+    return E_NOINTERFACE;
+  }
+
+  virtual ULONG STDMETHODCALLTYPE AddRef(void) {
+    DVLOG(1) << __FUNCTION__;
+    return 1;
+  }
+
+  virtual ULONG STDMETHODCALLTYPE Release(void) {
+    DVLOG(1) << __FUNCTION__;
+    return 1;
+  }
+
+  virtual HRESULT STDMETHODCALLTYPE Invoke(winui::Popups::IUICommand* command);
+
+ private:
+  // The actual dialog box.
+  mswr::ComPtr<winui::Popups::IMessageDialog> dialog_box_;
+  DialogBoxInfo dialog_box_info_;
+};
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_METRO_DIALOG_BOX_H_
+
diff --git a/win8/metro_driver/metro_driver.cc b/win8/metro_driver/metro_driver.cc
new file mode 100644
index 0000000..89bd35a
--- /dev/null
+++ b/win8/metro_driver/metro_driver.cc
@@ -0,0 +1,211 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+
+#include <roerrorapi.h>
+#include <shobjidl.h>
+
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/logging_win.h"
+#include "base/win/scoped_comptr.h"
+#include "win8/metro_driver/chrome_app_view.h"
+#include "win8/metro_driver/winrt_utils.h"
+#include "sandbox/win/src/sidestep/preamble_patcher.h"
+
+// TODO(siggi): Move this to GYP.
+#pragma comment(lib, "runtimeobject.lib")
+
+namespace {
+
+LONG WINAPI ErrorReportingHandler(EXCEPTION_POINTERS* ex_info) {
+  // See roerrorapi.h for a description of the
+  // exception codes and parameters.
+  DWORD code = ex_info->ExceptionRecord->ExceptionCode;
+  ULONG_PTR* info = ex_info->ExceptionRecord->ExceptionInformation;
+  if (code == EXCEPTION_RO_ORIGINATEERROR) {
+    string16 msg(reinterpret_cast<wchar_t*>(info[2]), info[1]);
+    LOG(ERROR) << "VEH: Metro error 0x" << std::hex << info[0] << ": " << msg;
+  } else if (code == EXCEPTION_RO_TRANSFORMERROR) {
+    string16 msg(reinterpret_cast<wchar_t*>(info[3]), info[2]);
+    LOG(ERROR) << "VEH: Metro old error 0x" << std::hex << info[0]
+               << " new error 0x" << info[1] << ": " << msg;
+  }
+
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+
+// TODO(robertshield): This GUID is hard-coded in a bunch of places that
+//     don't allow explicit includes. Find a single place for it to live.
+// {7FE69228-633E-4f06-80C1-527FEA23E3A7}
+const GUID kChromeTraceProviderName = {
+    0x7fe69228, 0x633e, 0x4f06,
+        { 0x80, 0xc1, 0x52, 0x7f, 0xea, 0x23, 0xe3, 0xa7 } };
+
+}
+// Required for base initialization.
+// TODO(siggi): This should be handled better, as this way our at exit
+//     registrations will run under the loader's lock. However,
+//     once metro_driver is merged into Chrome.dll, this will go away anyhow.
+base::AtExitManager at_exit;
+
+namespace Hacks {
+
+typedef BOOL (WINAPI* IsImmersiveFunctionPtr)(HANDLE process);
+char* g_real_is_immersive_proc_stub = NULL;
+
+HMODULE g_webrtc_quartz_dll_handle = NULL;
+bool g_fake_is_immersive_process_ret = false;
+
+BOOL WINAPI MetroChromeIsImmersiveIntercept(HANDLE process) {
+  if (g_fake_is_immersive_process_ret && process == ::GetCurrentProcess())
+    return FALSE;
+
+  IsImmersiveFunctionPtr real_proc =
+      reinterpret_cast<IsImmersiveFunctionPtr>(
+          static_cast<char*>(g_real_is_immersive_proc_stub));
+  return real_proc(process);
+}
+
+void MetroSpecificHacksInitialize() {
+  // The quartz dll which is used by the webrtc code in Chrome fails in a metro
+  // app. It checks this via the IsImmersiveProcess export in user32. We
+  // intercept the same and spoof the value as false. This is ok as technically
+  // a metro browser is not a real metro application. The webrtc functionality
+  // works fine with this hack.
+  // TODO(tommi)
+  // BUG:- https://code.google.com/p/chromium/issues/detail?id=140545
+  // We should look into using media foundation on windows 8 in metro chrome.
+  IsImmersiveFunctionPtr is_immersive_func_address =
+      reinterpret_cast<IsImmersiveFunctionPtr>(::GetProcAddress(
+          ::GetModuleHandle(L"user32.dll"), "IsImmersiveProcess"));
+  DCHECK(is_immersive_func_address);
+
+  // Allow the function to be patched by changing the protections on the page.
+  DWORD old_protect = 0;
+  ::VirtualProtect(is_immersive_func_address, 5, PAGE_EXECUTE_READWRITE,
+                   &old_protect);
+
+  DCHECK(g_real_is_immersive_proc_stub == NULL);
+  g_real_is_immersive_proc_stub = reinterpret_cast<char*>(VirtualAllocEx(
+      ::GetCurrentProcess(), NULL, sidestep::kMaxPreambleStubSize,
+      MEM_COMMIT, PAGE_EXECUTE_READWRITE));
+  DCHECK(g_real_is_immersive_proc_stub);
+
+  sidestep::SideStepError patch_result =
+      sidestep::PreamblePatcher::Patch(
+          is_immersive_func_address, MetroChromeIsImmersiveIntercept,
+          g_real_is_immersive_proc_stub, sidestep::kMaxPreambleStubSize);
+
+  DCHECK(patch_result == sidestep::SIDESTEP_SUCCESS);
+
+  // Restore the permissions on the page in user32 containing the
+  // IsImmersiveProcess function code.
+  DWORD dummy = 0;
+  ::VirtualProtect(is_immersive_func_address, 5, old_protect, &dummy);
+
+  // Mimic the original page permissions from the IsImmersiveProcess page
+  // on our stub.
+  ::VirtualProtect(g_real_is_immersive_proc_stub,
+                   sidestep::kMaxPreambleStubSize,
+                   old_protect,
+                   &old_protect);
+
+  g_fake_is_immersive_process_ret = true;
+  g_webrtc_quartz_dll_handle = LoadLibrary(L"quartz.dll");
+  g_fake_is_immersive_process_ret = false;
+
+  DCHECK(g_webrtc_quartz_dll_handle);
+  if (!g_webrtc_quartz_dll_handle) {
+    DVLOG(1) << "Quartz dll load failed with error: " << GetLastError();
+  } else {
+    // Pin the quartz module to protect against it being inadvarently unloaded.
+    ::GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_PIN, L"quartz.dll",
+                        &g_webrtc_quartz_dll_handle);
+  }
+}
+
+}  // namespace Hacks
+
+extern "C" __declspec(dllexport)
+int InitMetro(LPTHREAD_START_ROUTINE thread_proc, void* context) {
+  // Initialize the command line.
+  CommandLine::Init(0, NULL);
+  logging::InitLogging(
+        NULL,
+        logging::LOG_ONLY_TO_SYSTEM_DEBUG_LOG,
+        logging::LOCK_LOG_FILE,
+        logging::DELETE_OLD_LOG_FILE,
+        logging::DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS);
+
+#if defined(NDEBUG)
+  logging::SetMinLogLevel(logging::LOG_ERROR);
+  // Bind to the breakpad handling function.
+  globals.breakpad_exception_handler =
+      reinterpret_cast<BreakpadExceptionHandler>(
+          ::GetProcAddress(::GetModuleHandle(NULL),
+                           "CrashForException"));
+  if (!globals.breakpad_exception_handler) {
+    DVLOG(0) << "CrashForException export not found";
+  }
+#else
+  logging::SetMinLogLevel(logging::LOG_VERBOSE);
+  // Set the error reporting flags to always raise an exception,
+  // which is then processed by our vectored exception handling
+  // above to log the error message.
+  winfoundtn::Diagnostics::SetErrorReportingFlags(
+      winfoundtn::Diagnostics::UseSetErrorInfo |
+      winfoundtn::Diagnostics::ForceExceptions);
+
+  HANDLE registration =
+      ::AddVectoredExceptionHandler(TRUE, ErrorReportingHandler);
+#endif
+
+  // Enable trace control and transport through event tracing for Windows.
+  logging::LogEventProvider::Initialize(kChromeTraceProviderName);
+
+  DVLOG(1) << "InitMetro";
+
+  mswrw::RoInitializeWrapper ro_initializer(RO_INIT_MULTITHREADED);
+  CheckHR(ro_initializer, "RoInitialize failed");
+
+  mswr::ComPtr<winapp::Core::ICoreApplication> core_app;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_ApplicationModel_Core_CoreApplication,
+      core_app.GetAddressOf());
+  CheckHR(hr, "Failed to create app factory");
+  if (FAILED(hr))
+    return 1;
+
+  // The metro specific hacks code assumes that there is only one thread active
+  // at the moment. This better be the case or we may have race conditions.
+  Hacks::MetroSpecificHacksInitialize();
+
+  auto view_factory = mswr::Make<ChromeAppViewFactory>(
+      core_app.Get(), thread_proc, context);
+  hr = core_app->Run(view_factory.Get());
+  DVLOG(1) << "exiting InitMetro, hr=" << hr;
+
+#if !defined(NDEBUG)
+  ::RemoveVectoredExceptionHandler(registration);
+#endif
+
+  return hr;
+}
+
+// Activates the application known by |app_id|.  Returns, among other things,
+// E_APPLICATION_NOT_REGISTERED if |app_id| identifies Chrome and Chrome is not
+// the default browser.
+extern "C" __declspec(dllexport)
+HRESULT ActivateApplication(const wchar_t* app_id) {
+  base::win::ScopedComPtr<IApplicationActivationManager> activator;
+  HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
+  if (SUCCEEDED(hr)) {
+    DWORD pid = 0;
+    hr = activator->ActivateApplication(app_id, L"", AO_NONE, &pid);
+  }
+  return hr;
+}
diff --git a/win8/metro_driver/metro_driver.gyp b/win8/metro_driver/metro_driver.gyp
new file mode 100644
index 0000000..266c4b6
--- /dev/null
+++ b/win8/metro_driver/metro_driver.gyp
@@ -0,0 +1,98 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'conditions': [
+    ['OS=="win" and (MSVS_VERSION=="2010" or MSVS_VERSION=="2010e")', {
+      'variables': {
+        'chromium_code': 1,
+      },
+      'includes': [
+        '../../build/win_precompile.gypi',
+      ],
+      'target_defaults': {
+        'defines': [
+          # This define is required to pull in the new Win8 interfaces from
+          # system headers like ShObjIdl.h
+          'NTDDI_VERSION=0x06020000',
+        ],
+        'msvs_settings': {
+            'VCLinkerTool': {
+                'AdditionalDependencies': [
+                    'D2D1.lib',
+                    'D3D11.lib',
+                ],
+            },
+        },
+      },
+      'targets': [
+        {
+          'target_name': 'metro_driver',
+          'type': 'shared_library',
+          'dependencies': [
+            '../../base/base.gyp:base',
+            '../../crypto/crypto.gyp:crypto',
+            '../../sandbox/sandbox.gyp:sandbox',
+            '../../google_update/google_update.gyp:google_update',
+            '../win8.gyp:check_sdk_patch',
+          ],
+          'sources': [
+            'chrome_app_view.cc',
+            'chrome_app_view.h',
+            'chrome_url_launch_handler.cc',
+            'chrome_url_launch_handler.h',
+            '../delegate_execute/chrome_util.cc',
+            '../win8/delegate_execute/chrome_util.h',
+            'devices_handler.cc',
+            'devices_handler.h',
+            'file_picker.h',
+            'file_picker.cc',
+            'metro_dialog_box.cc',
+            'metro_dialog_box.h',
+            'metro_driver.cc',
+            'print_handler.cc',
+            'print_handler.h',
+            'print_document_source.cc',
+            'print_document_source.h',
+            'secondary_tile.h',
+            'secondary_tile.cc',
+            'settings_handler.cc',
+            'settings_handler.h',
+            'stdafx.h',
+            'toast_notification_handler.cc',
+            'toast_notification_handler.h',
+            'winrt_utils.cc',
+            'winrt_utils.h',
+          ],
+          'copies': [
+            {
+              'destination': '<(PRODUCT_DIR)',
+              'files': [
+                'resources/Logo.png',
+                'resources/SecondaryTile.png',
+                'resources/SmallLogo.png',
+                'resources/splash-620x300.png',
+                'resources/VisualElementsManifest.xml',
+              ],
+            },
+          ],
+        },
+        {
+          'target_name': 'metro_driver_unittests',
+          'type': 'executable',
+          'dependencies': [
+            '../../base/base.gyp:base',
+            '../../testing/gtest.gyp:gtest',
+            'metro_driver',
+          ],
+          'sources': [
+            'run_all_unittests.cc',
+            'winrt_utils.cc',
+            'winrt_utils.h',
+            'winrt_utils_unittest.cc',
+          ],
+        },
+      ],
+    },],
+  ],
+}
diff --git a/win8/metro_driver/metro_driver_win7.cc b/win8/metro_driver/metro_driver_win7.cc
new file mode 100644
index 0000000..253e527
--- /dev/null
+++ b/win8/metro_driver/metro_driver_win7.cc
@@ -0,0 +1,139 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+
+EXTERN_C IMAGE_DOS_HEADER __ImageBase;
+
+struct Globals {
+  LPTHREAD_START_ROUTINE host_main;
+  void* host_context;
+  HWND core_window;
+  HWND host_window;
+  HANDLE host_thread;
+  DWORD main_thread_id;
+} globals;
+
+
+void ODS(const char* str, LONG_PTR val = 0) {
+  char buf[80];
+  size_t len = strlen(str);
+  if (len > 50) {
+    ::OutputDebugStringA("ODS: buffer too long");
+    return;
+  }
+
+  if (str[0] == '!') {
+    // Fatal error.
+    DWORD gle = ::GetLastError();
+    if (::IsDebuggerPresent())
+      __debugbreak();
+    wsprintfA(buf, "ODS:fatal %s (%p) gle=0x%x", str, val, gle);
+    ::MessageBoxA(NULL, buf, "!!!", MB_OK);
+    ::ExitProcess(gle);
+  } else {
+    // Just information.
+    wsprintfA(buf, "ODS:%s (%p)\n", str, val);
+    ::OutputDebugStringA(buf);
+  }
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
+                         WPARAM wparam, LPARAM lparam) {
+  PAINTSTRUCT ps;
+  HDC hdc;
+  switch (message) {
+    case WM_PAINT:
+      hdc = BeginPaint(hwnd, &ps);
+      EndPaint(hwnd, &ps);
+      break;
+    case WM_DESTROY:
+      PostQuitMessage(0);
+      ODS("Metro WM_DESTROY received");
+      break;
+    default:
+      return DefWindowProc(hwnd, message, wparam, lparam);
+  }
+  return 0;
+}
+
+HWND CreateMetroTopLevelWindow() {
+  HINSTANCE hInst = reinterpret_cast<HINSTANCE>(&__ImageBase);
+  WNDCLASSEXW wcex;
+  wcex.cbSize = sizeof(wcex);
+  wcex.style                    = CS_HREDRAW | CS_VREDRAW;
+        wcex.lpfnWndProc        = WndProc;
+        wcex.cbClsExtra         = 0;
+        wcex.cbWndExtra         = 0;
+        wcex.hInstance          = hInst;
+        wcex.hIcon              = 0;
+        wcex.hCursor            = LoadCursor(NULL, IDC_ARROW);
+        wcex.hbrBackground      = (HBRUSH)(COLOR_INACTIVECAPTION+1);
+        wcex.lpszMenuName       = 0;
+        wcex.lpszClassName      = L"Windows.UI.Core.CoreWindow";
+        wcex.hIconSm            = 0;
+
+  HWND hwnd = ::CreateWindowExW(0,
+                                MAKEINTATOM(::RegisterClassExW(&wcex)),
+                                L"metro_metro",
+                                WS_POPUP,
+                                0, 0, 0, 0,
+                                NULL, NULL, hInst, NULL);
+  return hwnd;
+}
+
+DWORD WINAPI HostThread(void*) {
+  // The sleeps simulates the delay we have in the actual metro code
+  // which takes in account the corewindow being created and some other
+  // unknown machinations of metro.
+  ODS("Chrome main thread", ::GetCurrentThreadId());
+  ::Sleep(30);
+  return globals.host_main(globals.host_context);
+}
+
+extern "C" __declspec(dllexport)
+int InitMetro(LPTHREAD_START_ROUTINE thread_proc, void* context) {
+  ODS("InitMetro [Win7 emulation]");
+  HWND window = CreateMetroTopLevelWindow();
+  if (!window)
+    return 1;
+  // This magic incatation tells windows that the window is going fullscreen
+  // so the taskbar gets out of the wait automatically.
+  ::SetWindowPos(window,
+                 HWND_TOP,
+                 0,0,
+                 GetSystemMetrics(SM_CXSCREEN),
+                 GetSystemMetrics(SM_CYSCREEN),
+                 SWP_SHOWWINDOW);
+
+  // Ready to start our caller.
+  globals.core_window = window;
+  globals.host_main = thread_proc;
+  globals.host_context = context;
+  HANDLE thread = ::CreateThread(NULL, 0, &HostThread, NULL, 0, NULL);
+
+  // Main message loop.
+  MSG msg = {0};
+  while (GetMessage(&msg, NULL, 0, 0)) {
+    TranslateMessage(&msg);
+    DispatchMessage(&msg);
+  }
+
+  return (int) msg.wParam;
+}
+
+extern "C" _declspec(dllexport) HWND GetRootWindow() {
+  ODS("GetRootWindow", ULONG_PTR(globals.core_window));
+  return globals.core_window;
+}
+
+extern "C" _declspec(dllexport) void SetFrameWindow(HWND window) {
+  ODS("SetFrameWindow", ULONG_PTR(window));
+  globals.host_window = window;
+}
+
+extern "C" __declspec(dllexport) const wchar_t* GetInitialUrl() {
+  return L"";
+}
+
diff --git a/win8/metro_driver/print_document_source.cc b/win8/metro_driver/print_document_source.cc
new file mode 100644
index 0000000..7469597
--- /dev/null
+++ b/win8/metro_driver/print_document_source.cc
@@ -0,0 +1,525 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "win8/metro_driver/print_document_source.h"
+
+#include <windows.graphics.display.h>
+
+#include "base/logging.h"
+
+
+namespace {
+
+class D2DFactoryAutoLock {
+ public:
+  explicit D2DFactoryAutoLock(ID2D1Factory* d2d_factory) {
+    HRESULT hr = d2d_factory->QueryInterface(IID_PPV_ARGS(&d2d_multithread_));
+    if (d2d_multithread_.Get())
+      d2d_multithread_->Enter();
+    else
+      NOTREACHED() << "Failed to QI for ID2D1Multithread " << std::hex << hr;
+  }
+
+  ~D2DFactoryAutoLock() {
+    if (d2d_multithread_.Get())
+      d2d_multithread_->Leave();
+  }
+
+ private:
+  mswr::ComPtr<ID2D1Multithread> d2d_multithread_;
+};
+
+// TODO(mad): remove once we don't run mixed SDK/OS anymore.
+const GUID kOldPackageTargetGuid =
+    {0xfb2a33c0, 0x8c35, 0x465f,
+      {0xbe, 0xd5, 0x9f, 0x36, 0x89, 0x51, 0x77, 0x52}};
+const GUID kNewPackageTargetGuid =
+    {0x1a6dd0ad, 0x1e2a, 0x4e99,
+      {0xa5, 0xba, 0x91, 0xf1, 0x78, 0x18, 0x29, 0x0e}};
+
+
+}  // namespace
+
+namespace metro_driver {
+
+PrintDocumentSource::PrintDocumentSource()
+    : page_count_ready_(true, false),
+      parent_lock_(NULL),
+      height_(0),
+      width_(0),
+      dpi_(96),
+      aborted_(false),
+      using_old_preview_interface_(false) {
+}
+
+HRESULT PrintDocumentSource::RuntimeClassInitialize(
+    const DirectXContext& directx_context,
+    base::Lock* parent_lock) {
+  DCHECK(parent_lock != NULL);
+  DCHECK(directx_context.d2d_context.Get() != NULL);
+  DCHECK(directx_context.d2d_device.Get() != NULL);
+  DCHECK(directx_context.d2d_factory.Get() != NULL);
+  DCHECK(directx_context.d3d_device.Get() != NULL);
+  DCHECK(directx_context.wic_factory.Get() != NULL);
+  directx_context_ = directx_context;
+
+  // No other method can be called before RuntimeClassInitialize which is called
+  // during the construction via mswr::MakeAndInitialize(), so it's safe for all
+  // other methods to use the parent_lock_ without checking if it's NULL.
+  DCHECK(parent_lock_ == NULL);
+  parent_lock_ = parent_lock;
+
+  return S_OK;
+}
+
+void PrintDocumentSource::Abort() {
+  base::AutoLock lock(*parent_lock_);
+  aborted_ = true;
+  if (page_count_ready_.IsSignaled()) {
+    pages_.clear();
+    for (size_t i = 0; i < pages_ready_state_.size(); ++i)
+      pages_ready_state_[i]->Broadcast();
+  } else {
+    DCHECK(pages_.empty() && pages_ready_state_.empty());
+  }
+}
+
+STDMETHODIMP PrintDocumentSource::GetPreviewPageCollection(
+    IPrintDocumentPackageTarget* package_target,
+    IPrintPreviewPageCollection** page_collection) {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(package_target != NULL);
+  DCHECK(page_collection != NULL);
+
+  HRESULT hr = package_target->GetPackageTarget(
+      __uuidof(IPrintPreviewDxgiPackageTarget),
+      IID_PPV_ARGS(&dxgi_preview_target_));
+  if (FAILED(hr)) {
+    // TODO(mad): remove once we don't run mixed SDK/OS anymore.
+    // The IID changed from one version of the SDK to another, so try the other
+    // one in case we are running a build from a different SDK than the one
+    // related to the OS version we are running.
+    GUID package_target_uuid = kNewPackageTargetGuid;
+    if (package_target_uuid == __uuidof(IPrintPreviewDxgiPackageTarget)) {
+      package_target_uuid = kOldPackageTargetGuid;
+      using_old_preview_interface_ = true;
+    }
+    hr = package_target->GetPackageTarget(package_target_uuid,
+                                          package_target_uuid,
+                                          &dxgi_preview_target_);
+    if (FAILED(hr)) {
+      LOG(ERROR) << "Failed to get IPrintPreviewDXGIPackageTarget " << std::hex
+                 << hr;
+      return hr;
+    }
+  } else {
+    using_old_preview_interface_ = (__uuidof(IPrintPreviewDxgiPackageTarget) ==
+                                    kOldPackageTargetGuid);
+  }
+
+  mswr::ComPtr<IPrintPreviewPageCollection> preview_page_collection;
+  mswr::ComPtr<PrintDocumentSource> print_document_source(this);
+  hr = print_document_source.As(&preview_page_collection);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to get preview_page_collection " << std::hex << hr;
+    return hr;
+  }
+
+  hr = preview_page_collection.CopyTo(page_collection);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to copy preview_page_collection " << std::hex << hr;
+    return hr;
+  }
+  return hr;
+}
+
+STDMETHODIMP PrintDocumentSource::MakeDocument(
+    IInspectable* options,
+    IPrintDocumentPackageTarget* package_target) {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(options != NULL);
+  DCHECK(package_target != NULL);
+
+  mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_task_options;
+  HRESULT hr = options->QueryInterface(
+      wingfx::Printing::IID_IPrintTaskOptionsCore,
+      reinterpret_cast<void**>(print_task_options.GetAddressOf()));
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
+    return hr;
+  }
+
+  // Use the first page's description for the whole document. Page numbers
+  // are 1-based in this context.
+  // TODO(mad): Check if it would be useful to use per page descriptions.
+  wingfx::Printing::PrintPageDescription page_desc = {};
+  hr = print_task_options->GetPageDescription(1 /* page */, &page_desc);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
+    return hr;
+  }
+
+  D2D1_PRINT_CONTROL_PROPERTIES print_control_properties;
+  if (page_desc.DpiX > page_desc.DpiY)
+    print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiY);
+  else
+    print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiX);
+
+  // Color space for vector graphics in D2D print control.
+  print_control_properties.colorSpace = D2D1_COLOR_SPACE_SRGB;
+  print_control_properties.fontSubset = D2D1_PRINT_FONT_SUBSET_MODE_DEFAULT;
+
+  mswr::ComPtr<ID2D1PrintControl> print_control;
+  hr = directx_context_.d2d_device->CreatePrintControl(
+      directx_context_.wic_factory.Get(),
+      package_target,
+      print_control_properties,
+      print_control.GetAddressOf());
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CreatePrintControl " << std::hex << hr;
+    return hr;
+  }
+
+  D2D1_SIZE_F page_size = D2D1::SizeF(page_desc.PageSize.Width,
+                                      page_desc.PageSize.Height);
+
+  // Wait for the number of pages to be available.
+  // If an abort occured, we'll get 0 and won't enter the loop below.
+  size_t page_count = WaitAndGetPageCount();
+
+  mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
+  for (size_t page = 0; page < page_count; ++page) {
+    gdi_metafile.Reset();
+    hr = WaitAndGetPage(page, gdi_metafile.GetAddressOf());
+    LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
+                              << hr;
+    // S_FALSE means we got aborted.
+    if (hr == S_FALSE || FAILED(hr))
+      break;
+    hr = PrintPage(print_control.Get(), gdi_metafile.Get(), page_size);
+    if (FAILED(hr))
+      break;
+  }
+
+  HRESULT close_hr = print_control->Close();
+  if (FAILED(close_hr) && SUCCEEDED(hr))
+    return close_hr;
+  else
+    return hr;
+}
+
+STDMETHODIMP PrintDocumentSource::Paginate(uint32 page,
+                                           IInspectable* options) {
+  DVLOG(1) << __FUNCTION__ << ", page = " << page;
+  DCHECK(options != NULL);
+  // GetPreviewPageCollection must have been successfuly called.
+  DCHECK(dxgi_preview_target_.Get() != NULL);
+
+  // Get print settings from PrintTaskOptions for preview, such as page
+  // description, which contains page size, imageable area, DPI.
+  // TODO(mad): obtain other print settings in the same way, such as ColorMode,
+  // NumberOfCopies, etc...
+  mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_options;
+  HRESULT hr = options->QueryInterface(
+      wingfx::Printing::IID_IPrintTaskOptionsCore,
+      reinterpret_cast<void**>(print_options.GetAddressOf()));
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
+    return hr;
+  }
+
+  wingfx::Printing::PrintPageDescription page_desc = {};
+  hr = print_options->GetPageDescription(1 /* page */, &page_desc);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
+    return hr;
+  }
+
+  width_ = page_desc.PageSize.Width;
+  height_ = page_desc.PageSize.Height;
+
+  hr = dxgi_preview_target_->InvalidatePreview();
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to InvalidatePreview " << std::hex << hr;
+    return hr;
+  }
+
+  size_t page_count = WaitAndGetPageCount();
+  // A page_count of 0 means abort...
+  if (page_count == 0)
+    return S_FALSE;
+  hr = dxgi_preview_target_->SetJobPageCount(PageCountType::FinalPageCount,
+                                             page_count);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to SetJobPageCount " << std::hex << hr;
+    return hr;
+  }
+  return hr;
+}
+
+STDMETHODIMP PrintDocumentSource::MakePage(uint32 job_page,
+                                           float width,
+                                           float height) {
+  DVLOG(1) << __FUNCTION__ << ", width: " << width << ", height: " << height
+          << ", job_page: " << job_page;
+  DCHECK(width > 0 && height > 0);
+  // Paginate must have been called before this.
+  if (width_ <= 0.0 || height_ <= 0.0)
+    return S_FALSE;
+
+  // When job_page is JOB_PAGE_APPLICATION_DEFINED, it means a new preview
+  // begins. TODO(mad): Double check if we need to cancel pending resources.
+  if (job_page == JOB_PAGE_APPLICATION_DEFINED)
+    job_page = 1;
+
+  winfoundtn::Size preview_size;
+  preview_size.Width  = width;
+  preview_size.Height = height;
+  float scale = width_ / width;
+
+  mswr::ComPtr<ID2D1Factory> factory;
+  directx_context_.d2d_device->GetFactory(&factory);
+
+  mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
+  HRESULT hr = WaitAndGetPage(job_page - 1, gdi_metafile.GetAddressOf());
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
+                            << hr;
+  // Again, S_FALSE means we got aborted.
+  if (hr == S_FALSE || FAILED(hr))
+    return hr;
+
+  // We are accessing D3D resources directly without D2D's knowledge, so we
+  // must manually acquire the D2D factory lock.
+  D2DFactoryAutoLock factory_lock(directx_context_.d2d_factory.Get());
+
+  CD3D11_TEXTURE2D_DESC texture_desc(
+      DXGI_FORMAT_B8G8R8A8_UNORM,
+      static_cast<UINT32>(ceil(width  * dpi_ / 96)),
+      static_cast<UINT32>(ceil(height * dpi_ / 96)),
+      1,
+      1,
+      D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE
+      );
+  mswr::ComPtr<ID3D11Texture2D> texture;
+  hr = directx_context_.d3d_device->CreateTexture2D(
+      &texture_desc, NULL, &texture);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create a 2D texture " << std::hex << hr;
+    return hr;
+  }
+
+  mswr::ComPtr<IDXGISurface> dxgi_surface;
+  hr = texture.As<IDXGISurface>(&dxgi_surface);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI for IDXGISurface " << std::hex << hr;
+    return hr;
+  }
+
+  // D2D device contexts are stateful, and hence a unique device context must
+  // be used on each call.
+  mswr::ComPtr<ID2D1DeviceContext> d2d_context;
+  hr = directx_context_.d2d_device->CreateDeviceContext(
+      D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);
+
+  d2d_context->SetDpi(dpi_, dpi_);
+
+  mswr::ComPtr<ID2D1Bitmap1> d2dSurfaceBitmap;
+  hr = d2d_context->CreateBitmapFromDxgiSurface(dxgi_surface.Get(),
+                                                NULL,  // default properties.
+                                                &d2dSurfaceBitmap);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CreateBitmapFromDxgiSurface " << std::hex << hr;
+    return hr;
+  }
+
+  d2d_context->SetTarget(d2dSurfaceBitmap.Get());
+  d2d_context->BeginDraw();
+  d2d_context->Clear();
+  d2d_context->SetTransform(D2D1::Matrix3x2F(1/scale, 0, 0, 1/scale, 0, 0));
+  d2d_context->DrawGdiMetafile(gdi_metafile.Get());
+
+  hr = d2d_context->EndDraw();
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to EndDraw " << std::hex << hr;
+    return hr;
+  }
+
+// TODO(mad): remove once we don't run mixed SDK/OS anymore.
+#ifdef __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
+  FLOAT dpi = dpi_;
+  if (using_old_preview_interface_) {
+    // We compiled with the new API but run on the old OS, so we must cheat
+    // and send something that looks like a float but has a UINT32 value.
+    *reinterpret_cast<UINT32*>(&dpi) = static_cast<UINT32>(dpi_);
+  }
+#else
+  UINT32 dpi = static_cast<UINT32>(dpi_);
+  if (!using_old_preview_interface_) {
+    // We compiled with the old API but run on the new OS, so we must cheat
+    // and send something that looks like a UINT32 but has a float value.
+    *reinterpret_cast<FLOAT*>(&dpi) = dpi_;
+  }
+#endif  // __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
+  hr = dxgi_preview_target_->DrawPage(job_page, dxgi_surface.Get(), dpi, dpi);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to DrawPage " << std::hex << hr;
+    return hr;
+  }
+  return hr;
+}
+
+void PrintDocumentSource::ResetDpi(float dpi) {
+  {
+    base::AutoLock lock(*parent_lock_);
+    if (dpi == dpi_)
+      return;
+    dpi_ = dpi;
+  }
+  directx_context_.d2d_context->SetDpi(dpi, dpi);
+}
+
+void PrintDocumentSource::SetPageCount(size_t page_count) {
+  DCHECK(page_count > 0);
+  {
+    base::AutoLock lock(*parent_lock_);
+    DCHECK(!page_count_ready_.IsSignaled());
+    DCHECK(pages_.empty() && pages_ready_state_.empty());
+
+    pages_.resize(page_count);
+    pages_ready_state_.resize(page_count);
+
+    for (size_t i = 0; i < page_count; ++i)
+      pages_ready_state_[i].reset(new base::ConditionVariable(parent_lock_));
+  }
+  page_count_ready_.Signal();
+}
+
+void PrintDocumentSource::AddPage(size_t page_number,
+                                  IStream* metafile_stream) {
+  DCHECK(metafile_stream != NULL);
+  base::AutoLock lock(*parent_lock_);
+
+  DCHECK(page_count_ready_.IsSignaled());
+  DCHECK(page_number < pages_.size());
+
+  pages_[page_number] = metafile_stream;
+  pages_ready_state_[page_number]->Signal();
+}
+
+HRESULT PrintDocumentSource::PrintPage(ID2D1PrintControl* print_control,
+                                       ID2D1GdiMetafile* gdi_metafile,
+                                       D2D1_SIZE_F page_size) {
+  DVLOG(1) << __FUNCTION__ << ", page_size: (" << page_size.width << ", "
+          << page_size.height << ")";
+  DCHECK(print_control != NULL);
+  DCHECK(gdi_metafile != NULL);
+
+  // D2D device contexts are stateful, and hence a unique device context must
+  // be used on each call.
+  mswr::ComPtr<ID2D1DeviceContext> d2d_context;
+  HRESULT hr = directx_context_.d2d_device->CreateDeviceContext(
+      D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CreateDeviceContext " << std::hex << hr;
+    return hr;
+  }
+
+  mswr::ComPtr<ID2D1CommandList> print_command_list;
+  hr = d2d_context->CreateCommandList(&print_command_list);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CreateCommandList " << std::hex << hr;
+    return hr;
+  }
+
+  d2d_context->SetTarget(print_command_list.Get());
+
+  d2d_context->BeginDraw();
+  d2d_context->DrawGdiMetafile(gdi_metafile);
+  hr = d2d_context->EndDraw();
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to EndDraw " << std::hex << hr;
+
+  // Make sure to always close the command list.
+  HRESULT close_hr = print_command_list->Close();
+  LOG_IF(ERROR, FAILED(close_hr)) << "Failed to close command list " << std::hex
+                                  << hr;
+  if (SUCCEEDED(hr) && SUCCEEDED(close_hr))
+    hr = print_control->AddPage(print_command_list.Get(), page_size, NULL);
+  if (FAILED(hr))
+    return hr;
+  else
+    return close_hr;
+}
+
+size_t PrintDocumentSource::WaitAndGetPageCount() {
+  // Properly protect the wait/access to the page count.
+  {
+    base::AutoLock lock(*parent_lock_);
+    if (aborted_)
+      return 0;
+    DCHECK(pages_.size() == pages_ready_state_.size());
+    if (!pages_.empty())
+      return pages_.size();
+  }
+  page_count_ready_.Wait();
+  {
+    base::AutoLock lock(*parent_lock_);
+    if (!aborted_) {
+      DCHECK(pages_.size() == pages_ready_state_.size());
+      return pages_.size();
+    }
+  }
+  // A page count of 0 means abort.
+  return 0;
+}
+
+HRESULT PrintDocumentSource::WaitAndGetPage(size_t page_number,
+                                            ID2D1GdiMetafile** gdi_metafile) {
+  // Properly protect the wait/access to the page data.
+  base::AutoLock lock(*parent_lock_);
+  // Make sure we weren't canceled before getting here.
+  // And the page count should have been received before we get here too.
+  if (aborted_)
+    return S_FALSE;
+
+  // We shouldn't be asked for a page until we got the page count.
+  DCHECK(page_count_ready_.IsSignaled());
+  DCHECK(page_number <= pages_ready_state_.size());
+  DCHECK(pages_.size() == pages_ready_state_.size());
+  while (!aborted_ && pages_[page_number].Get() == NULL)
+    pages_ready_state_[page_number]->Wait();
+
+  // Make sure we weren't aborted while we waited unlocked.
+  if (aborted_)
+    return S_FALSE;
+  DCHECK(page_number < pages_.size());
+
+  mswr::ComPtr<ID2D1Factory> factory;
+  directx_context_.d2d_device->GetFactory(&factory);
+
+  mswr::ComPtr<ID2D1Factory1> factory1;
+  HRESULT hr = factory.As(&factory1);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI for ID2D1Factory1 " << std::hex << hr;
+    return hr;
+  }
+
+  ULARGE_INTEGER result;
+  LARGE_INTEGER seek_pos;
+  seek_pos.QuadPart = 0;
+  hr = pages_[page_number]->Seek(seek_pos, STREAM_SEEK_SET, &result);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to Seek page stream " << std::hex << hr;
+    return hr;
+  }
+
+  hr = factory1->CreateGdiMetafile(pages_[page_number].Get(), gdi_metafile);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CreateGdiMetafile " << std::hex << hr;
+    return hr;
+  }
+  return hr;
+}
+
+}  // namespace metro_driver
diff --git a/win8/metro_driver/print_document_source.h b/win8/metro_driver/print_document_source.h
new file mode 100644
index 0000000..fed333e
--- /dev/null
+++ b/win8/metro_driver/print_document_source.h
@@ -0,0 +1,164 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_
+
+#include <documentsource.h>
+#include <printpreview.h>
+#include <windows.graphics.printing.h>
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/condition_variable.h"
+#include "base/synchronization/waitable_event.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+// Hack to be removed once we don't need to build with an SDK earlier than
+// 8441 where the name of the interface has been changed.
+// TODO(mad): remove once we don't run mixed SDK/OS anymore.
+#ifndef __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
+typedef IPrintPreviewDXGIPackageTarget IPrintPreviewDxgiPackageTarget;
+#endif
+
+
+namespace base {
+class Lock;
+};  // namespace base
+
+namespace metro_driver {
+
+// This class is given to Metro as a source for print documents.
+// The methodless IPrintDocumentSource interface is used to identify it as such.
+// Then, the other interfaces are used to generate preview and print documents.
+// It also exposes a few methods for the print handler to control the document.
+class PrintDocumentSource
+    : public mswr::RuntimeClass<
+          mswr::RuntimeClassFlags<mswr::WinRtClassicComMix>,
+          wingfx::Printing::IPrintDocumentSource,
+          IPrintDocumentPageSource,
+          IPrintPreviewPageCollection> {
+ public:
+  // A set of interfaces for the DirectX context that our parent owns
+  // and that don't need to change from document to document.
+  struct DirectXContext {
+    DirectXContext() {}
+    DirectXContext(ID3D11Device1* device_3d,
+                   ID2D1Factory1* factory_2d,
+                   ID2D1Device* device_2d,
+                   ID2D1DeviceContext* context_2d,
+                   IWICImagingFactory2* factory_wic)
+        : d3d_device(device_3d),
+          d2d_factory(factory_2d),
+          d2d_device(device_2d),
+          d2d_context(context_2d),
+          wic_factory(factory_wic) {
+    }
+    DirectXContext(const DirectXContext& other)
+        : d3d_device(other.d3d_device),
+          d2d_factory(other.d2d_factory),
+          d2d_device(other.d2d_device),
+          d2d_context(other.d2d_context),
+          wic_factory(other.wic_factory) {
+    }
+    mswr::ComPtr<ID3D11Device1> d3d_device;
+    mswr::ComPtr<ID2D1Factory1> d2d_factory;
+    mswr::ComPtr<ID2D1Device> d2d_device;
+    mswr::ComPtr<ID2D1DeviceContext> d2d_context;
+    mswr::ComPtr<IWICImagingFactory2> wic_factory;
+  };
+
+  // Construction / Initialization.
+  explicit PrintDocumentSource();
+  HRESULT RuntimeClassInitialize(const DirectXContext& directx_context,
+                                 base::Lock* parent_lock);
+  // Aborts any pending asynchronous operation.
+  void Abort();
+
+  // classic COM interface IPrintDocumentPageSource methods
+  STDMETHOD(GetPreviewPageCollection) (
+      IPrintDocumentPackageTarget* package_target,
+      IPrintPreviewPageCollection** page_collection);
+  STDMETHOD(MakeDocument)(IInspectable* options,
+                          IPrintDocumentPackageTarget* package_target);
+
+  // classic COM interface IPrintPreviewPageCollection methods
+  STDMETHOD(Paginate)(uint32 page, IInspectable* options);
+  STDMETHOD(MakePage)(uint32 desired_page, float width, float height);
+
+  // If the screen DPI changes, we must be warned here.
+  void ResetDpi(float dpi);
+
+  // When the page count is known, this is called and we can setup our data.
+  void SetPageCount(size_t page_count);
+
+  // Every time a page is ready, this is called and we can read the data if
+  // we were waiting for it, or store it for later use.
+  void AddPage(size_t page_number, IStream* metafile_stream);
+
+ private:
+  // Print the page given in the metafile stream to the given print control.
+  HRESULT PrintPage(ID2D1PrintControl* print_control,
+                    ID2D1GdiMetafile* metafile_stream,
+                    D2D1_SIZE_F pageSize);
+
+  // Helper function to wait for the page count to be ready.
+  // Returns 0 when aborted.
+  size_t WaitAndGetPageCount();
+
+  // Helper function to wait for a given page to be ready.
+  // Returns S_FALSE when aborted.
+  HRESULT WaitAndGetPage(size_t page_number,
+                         ID2D1GdiMetafile** metafile_stream);
+
+  DirectXContext directx_context_;
+
+  // Once page data is available, it's added to this vector.
+  std::vector<mswr::ComPtr<IStream>> pages_;
+
+  // When page count is set, the size of this vector is set to that number.
+  // Then, every time page data is added to pages_, the associated condition
+  // variable in this vector is signaled. This is only filled when we receive
+  // the page count, so we must wait on page_count_ready_ before accessing
+  // the content of this vector.
+  std::vector<scoped_ptr<base::ConditionVariable> > pages_ready_state_;
+
+  // This event is signaled when we receive a page count from Chrome. We should
+  // not receive any page data before the count, so we can check this event
+  // while waiting for pages too, in case we ask for page data before we got
+  // the count, so before we properly initialized pages_ready_state_.
+  base::WaitableEvent page_count_ready_;
+
+  // The preview target interface set from within GetPreviewPageCollection
+  // but used from within MakePage.
+  mswr::ComPtr<IPrintPreviewDxgiPackageTarget> dxgi_preview_target_;
+
+  // Our parent's lock (to make sure it is initialized and destroyed early
+  // enough), which we use to protect access to our data members.
+  base::Lock* parent_lock_;
+
+  // The width/height requested in Paginate and used in MakePage.
+  // TODO(mad): Height is currently not used, and width is only used for
+  // scaling. We need to add a way to specify width and height when we request
+  // pages from Chrome.
+  float height_;
+  float width_;
+
+  // The DPI is set by Windows and we need to give it to DirectX.
+  float dpi_;
+
+  // A flag identiying that we have been aborted. Needed to properly handle
+  // asynchronous callbacks.
+  bool aborted_;
+
+  // TODO(mad): remove once we don't run mixed SDK/OS anymore.
+  bool using_old_preview_interface_;
+};
+
+}  // namespace metro_driver
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_PRINT_DOCUMENT_SOURCE_H_
diff --git a/win8/metro_driver/print_handler.cc b/win8/metro_driver/print_handler.cc
new file mode 100644
index 0000000..dce321a
--- /dev/null
+++ b/win8/metro_driver/print_handler.cc
@@ -0,0 +1,487 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "win8/metro_driver/print_handler.h"
+
+#include <windows.graphics.display.h>
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "chrome/app/chrome_command_ids.h"
+#include "win8/metro_driver/chrome_app_view.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+namespace {
+
+typedef winfoundtn::ITypedEventHandler<
+    wingfx::Printing::PrintManager*,
+    wingfx::Printing::PrintTaskRequestedEventArgs*> PrintRequestedHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    wingfx::Printing::PrintTask*,
+    wingfx::Printing::PrintTaskCompletedEventArgs*> PrintTaskCompletedHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    wingfx::Printing::PrintTask*, IInspectable*> PrintTaskInspectableHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    wingfx::Printing::PrintTask*,
+    wingfx::Printing::PrintTaskProgressingEventArgs*>
+    PrintTaskProgressingHandler;
+
+}  // namespace
+
+namespace metro_driver {
+
+mswr::ComPtr<PrintDocumentSource> PrintHandler::current_document_source_;
+bool PrintHandler::printing_enabled_ = false;
+base::Lock* PrintHandler::lock_ = NULL;
+base::Thread* PrintHandler::thread_ = NULL;
+
+PrintHandler::PrintHandler() {
+  DCHECK(lock_ == NULL);
+  lock_ = new  base::Lock();
+
+  DCHECK(thread_ == NULL);
+  thread_ = new base::Thread("Metro Print Handler");
+  thread_->Start();
+}
+
+PrintHandler::~PrintHandler() {
+  ClearPrintTask();
+  DCHECK(current_document_source_.Get() == NULL);
+
+  // Get all pending tasks to complete cleanly by Stopping the thread.
+  // They should complete quickly since current_document_source_ is NULL.
+  DCHECK(thread_ != NULL);
+  DCHECK(thread_->IsRunning());
+  thread_->Stop();
+  delete thread_;
+  thread_ = NULL;
+
+  DCHECK(lock_ != NULL);
+  delete lock_;
+  lock_ = NULL;
+}
+
+HRESULT PrintHandler::Initialize(winui::Core::ICoreWindow* window) {
+  // Register for Print notifications.
+  mswr::ComPtr<wingfx::Printing::IPrintManagerStatic> print_mgr_static;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Graphics_Printing_PrintManager,
+      print_mgr_static.GetAddressOf());
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create PrintManagerStatic " << std::hex << hr;
+    return hr;
+  }
+
+  mswr::ComPtr<wingfx::Printing::IPrintManager> print_mgr;
+  hr = print_mgr_static->GetForCurrentView(&print_mgr);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to get PrintManager for current view " << std::hex
+               << hr;
+    return hr;
+  }
+
+  hr = print_mgr->add_PrintTaskRequested(
+      mswr::Callback<PrintRequestedHandler>(
+          this, &PrintHandler::OnPrintRequested).Get(),
+      &print_requested_token_);
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to register PrintTaskRequested "
+                            << std::hex << hr;
+
+  mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Graphics_Display_DisplayProperties,
+      display_properties.GetAddressOf());
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create DisplayPropertiesStatics " << std::hex
+               << hr;
+    return hr;
+  }
+
+  hr = display_properties->add_LogicalDpiChanged(
+      mswr::Callback<
+          wingfx::Display::IDisplayPropertiesEventHandler,
+          PrintHandler>(this, &PrintHandler::LogicalDpiChanged).Get(),
+      &dpi_change_token_);
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to register LogicalDpiChanged "
+                            << std::hex << hr;
+
+  // This flag adds support for surfaces with a different color channel
+  // ordering than the API default. It is recommended usage, and is required
+  // for compatibility with Direct2D.
+  UINT creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
+#if defined(_DEBUG)
+  creation_flags |= D3D11_CREATE_DEVICE_DEBUG;
+#endif
+
+  // This array defines the set of DirectX hardware feature levels we support.
+  // The ordering MUST be preserved. All applications are assumed to support
+  // 9.1 unless otherwise stated by the application, which is not our case.
+  D3D_FEATURE_LEVEL feature_levels[] = {
+    D3D_FEATURE_LEVEL_11_1,
+    D3D_FEATURE_LEVEL_11_0,
+    D3D_FEATURE_LEVEL_10_1,
+    D3D_FEATURE_LEVEL_10_0,
+    D3D_FEATURE_LEVEL_9_3,
+    D3D_FEATURE_LEVEL_9_2,
+    D3D_FEATURE_LEVEL_9_1 };
+
+  mswr::ComPtr<ID3D11Device> device;
+  mswr::ComPtr<ID3D11DeviceContext> context;
+  hr = D3D11CreateDevice(
+      NULL,  // Specify null to use the default adapter.
+      D3D_DRIVER_TYPE_HARDWARE,
+      0,  // Leave as 0 unless software device.
+      creation_flags,
+      feature_levels,
+      ARRAYSIZE(feature_levels),
+      D3D11_SDK_VERSION,  // Must always use this value in Metro apps.
+      &device,
+      NULL,  // Returns feature level of device created.
+      &context);
+  if (hr == DXGI_ERROR_UNSUPPORTED) {
+    // The hardware is not supported, try a reference driver instead.
+    hr = D3D11CreateDevice(
+        NULL,  // Specify null to use the default adapter.
+        D3D_DRIVER_TYPE_REFERENCE,
+        0,  // Leave as 0 unless software device.
+        creation_flags,
+        feature_levels,
+        ARRAYSIZE(feature_levels),
+        D3D11_SDK_VERSION,  // Must always use this value in Metro apps.
+        &device,
+        NULL,  // Returns feature level of device created.
+        &context);
+  }
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create D3D11 device/context " << std::hex << hr;
+    return hr;
+  }
+
+  hr = device.As(&directx_context_.d3d_device);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI D3D11 device " << std::hex << hr;
+    return hr;
+  }
+
+  D2D1_FACTORY_OPTIONS options;
+  ZeroMemory(&options, sizeof(D2D1_FACTORY_OPTIONS));
+
+#if defined(_DEBUG)
+  options.debugLevel = D2D1_DEBUG_LEVEL_INFORMATION;
+#endif
+
+  hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_MULTI_THREADED,
+                         __uuidof(ID2D1Factory1),
+                         &options,
+                         &directx_context_.d2d_factory);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create D2D1 factory " << std::hex << hr;
+    return hr;
+  }
+
+  mswr::ComPtr<IDXGIDevice> dxgi_device;
+  hr = directx_context_.d3d_device.As(&dxgi_device);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to QI for IDXGIDevice " << std::hex << hr;
+    return hr;
+  }
+
+  hr = directx_context_.d2d_factory->CreateDevice(
+      dxgi_device.Get(), &directx_context_.d2d_device);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to Create D2DDevice " << std::hex << hr;
+    return hr;
+  }
+
+  hr = directx_context_.d2d_device->CreateDeviceContext(
+      D2D1_DEVICE_CONTEXT_OPTIONS_NONE,
+      &directx_context_.d2d_context);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to Create D2DDeviceContext " << std::hex << hr;
+    return hr;
+  }
+
+  hr = CoCreateInstance(CLSID_WICImagingFactory,
+                        NULL,
+                        CLSCTX_INPROC_SERVER,
+                        IID_PPV_ARGS(&directx_context_.wic_factory));
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to CoCreate WICImagingFactory " << std::hex << hr;
+    return hr;
+  }
+  return hr;
+}
+
+void PrintHandler::EnablePrinting(bool printing_enabled) {
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::OnEnablePrinting, printing_enabled));
+}
+
+void PrintHandler::SetPageCount(size_t page_count) {
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::OnSetPageCount, page_count));
+}
+
+void PrintHandler::AddPage(size_t page_number, IStream* metafile_stream) {
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::OnAddPage,
+                 page_number,
+                 mswr::ComPtr<IStream>(metafile_stream)));
+}
+
+void PrintHandler::ShowPrintUI() {
+  // Post the print UI request over to the metro thread.
+  DCHECK(globals.appview_msg_loop != NULL);
+  bool posted = globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&metro_driver::PrintHandler::OnShowPrintUI));
+  DCHECK(posted);
+}
+
+HRESULT PrintHandler::OnPrintRequested(
+    wingfx::Printing::IPrintManager* print_mgr,
+    wingfx::Printing::IPrintTaskRequestedEventArgs* event_args) {
+  DVLOG(1) << __FUNCTION__;
+
+  HRESULT hr = S_OK;
+  if (printing_enabled_) {
+    mswr::ComPtr<wingfx::Printing::IPrintTaskRequest> print_request;
+    hr = event_args->get_Request(print_request.GetAddressOf());
+    if (FAILED(hr)) {
+      LOG(ERROR) << "Failed to get the Print Task request " << std::hex << hr;
+      return hr;
+    }
+
+    mswrw::HString title;
+    title.Attach(MakeHString(L"Printing"));
+    hr = print_request->CreatePrintTask(
+        title.Get(),
+        mswr::Callback<
+            wingfx::Printing::IPrintTaskSourceRequestedHandler,
+            PrintHandler>(this, &PrintHandler::OnPrintTaskSourceRequest).Get(),
+        print_task_.GetAddressOf());
+    if (FAILED(hr)) {
+      LOG(ERROR) << "Failed to create the Print Task " << std::hex << hr;
+      return hr;
+    }
+
+    hr = print_task_->add_Completed(
+        mswr::Callback<PrintTaskCompletedHandler>(
+            this, &PrintHandler::OnCompleted).Get(), &print_completed_token_);
+    LOG_IF(ERROR, FAILED(hr)) << "Failed to create the Print Task " << std::hex
+                              << hr;
+  }
+  return hr;
+}
+
+HRESULT PrintHandler::OnPrintTaskSourceRequest(
+    wingfx::Printing::IPrintTaskSourceRequestedArgs* args) {
+  DVLOG(1) << __FUNCTION__;
+  mswr::ComPtr<PrintDocumentSource> print_document_source;
+  HRESULT hr = mswr::MakeAndInitialize<PrintDocumentSource>(
+      &print_document_source, directx_context_, lock_);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to create document source " << std::hex << hr;
+    return hr;
+  }
+
+  print_document_source->ResetDpi(GetLogicalDpi());
+
+  mswr::ComPtr<wingfx::Printing::IPrintDocumentSource> print_source;
+  hr = print_document_source.As(&print_source);
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to cast document Source " << std::hex << hr;
+    return hr;
+  }
+
+  hr = args->SetSource(print_source.Get());
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to set document Source " << std::hex << hr;
+    return hr;
+  }
+
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::SetPrintDocumentSource,
+                 print_document_source));
+
+  return hr;
+}
+
+HRESULT PrintHandler::OnCompleted(
+    wingfx::Printing::IPrintTask* task,
+    wingfx::Printing::IPrintTaskCompletedEventArgs* args) {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(globals.appview_msg_loop->BelongsToCurrentThread());
+  ClearPrintTask();
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::ReleasePrintDocumentSource));
+
+  return S_OK;
+}
+
+void PrintHandler::ClearPrintTask() {
+  if (!print_task_.Get())
+    return;
+
+  HRESULT hr = print_task_->remove_Completed(print_completed_token_);
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to remove completed event from Task "
+                            << std::hex << hr;
+  print_task_.Reset();
+}
+
+float PrintHandler::GetLogicalDpi() {
+  mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Graphics_Display_DisplayProperties,
+      display_properties.GetAddressOf());
+  if (FAILED(hr)) {
+    LOG(ERROR) << "Failed to get display properties " << std::hex << hr;
+    return 0.0;
+  }
+
+  FLOAT dpi = 0.0;
+  hr = display_properties->get_LogicalDpi(&dpi);
+  LOG_IF(ERROR, FAILED(hr)) << "Failed to get Logical DPI " << std::hex << hr;
+
+  return dpi;
+}
+
+HRESULT PrintHandler::LogicalDpiChanged(IInspectable *sender) {
+  DVLOG(1) << __FUNCTION__;
+  thread_->message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&PrintHandler::OnLogicalDpiChanged, GetLogicalDpi()));
+  return S_OK;
+}
+
+void PrintHandler::OnLogicalDpiChanged(float dpi) {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  // No need to protect the access to the static variable,
+  // since it's set/released in this same thread.
+  if (current_document_source_.Get() != NULL)
+    current_document_source_->ResetDpi(dpi);
+}
+
+void PrintHandler::SetPrintDocumentSource(
+    const mswr::ComPtr<PrintDocumentSource>& print_document_source) {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  DCHECK(current_document_source_.Get() == NULL);
+  {
+    // Protect against the other thread which might try to access it.
+    base::AutoLock lock(*lock_);
+    current_document_source_ = print_document_source;
+  }
+  // Start generating the images to print.
+  // TODO(mad): Use a registered message with more information about the print
+  // request, and at a more appropriate time too, and maybe one page at a time.
+  ::PostMessageW(globals.host_windows.front().first,
+                 WM_SYSCOMMAND,
+                 IDC_PRINT_TO_DESTINATION,
+                 0);
+}
+
+void PrintHandler::ReleasePrintDocumentSource() {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  mswr::ComPtr<PrintDocumentSource> print_document_source;
+  {
+    // Must wait for other thread to be done with the pointer first.
+    base::AutoLock lock(*lock_);
+    current_document_source_.Swap(print_document_source);
+  }
+  // This may happen before we get a chance to set the value.
+  if (print_document_source.Get() != NULL)
+    print_document_source->Abort();
+}
+
+void PrintHandler::OnEnablePrinting(bool printing_enabled) {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  base::AutoLock lock(*lock_);
+  printing_enabled_ = printing_enabled;
+  // Don't abort if we are being disabled since we may be finishing a previous
+  // print request which was valid and should be finished. We just need to
+  // prevent any new print requests. And don't assert that we are NOT printing
+  // if we are becoming enabled since we may be finishing a long print while
+  // we got disabled and then enabled again...
+}
+
+void PrintHandler::OnSetPageCount(size_t page_count) {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  // No need to protect the access to the static variable,
+  // since it's set/released in this same thread.
+  if (current_document_source_.Get() != NULL)
+    current_document_source_->SetPageCount(page_count);
+}
+
+void PrintHandler::OnAddPage(size_t page_number,
+                             mswr::ComPtr<IStream> metafile_stream) {
+  DCHECK(MessageLoop::current() == thread_->message_loop());
+  // No need to protect the access to the static variable,
+  // since it's set/released in this same thread.
+  if (current_document_source_.Get() != NULL)
+    current_document_source_->AddPage(page_number, metafile_stream.Get());
+}
+
+void PrintHandler::OnShowPrintUI() {
+  DCHECK(globals.appview_msg_loop->BelongsToCurrentThread());
+  mswr::ComPtr<wingfx::Printing::IPrintManagerStatic> print_mgr_static;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Graphics_Printing_PrintManager,
+      print_mgr_static.GetAddressOf());
+  if (SUCCEEDED(hr)) {
+    DCHECK(print_mgr_static.Get() != NULL);
+    // Note that passing NULL to ShowPrintUIAsync crashes,
+    // so we need to setup a temp pointer.
+    mswr::ComPtr<winfoundtn::IAsyncOperation<bool>> unused_async_op;
+    hr = print_mgr_static->ShowPrintUIAsync(unused_async_op.GetAddressOf());
+    LOG_IF(ERROR, FAILED(hr)) << "Failed to ShowPrintUIAsync "
+                              << std::hex << std::showbase << hr;
+  } else {
+    LOG(ERROR) << "Failed to create PrintManagerStatic "
+               << std::hex << std::showbase << hr;
+  }
+}
+
+}  // namespace metro_driver
+
+void MetroEnablePrinting(BOOL printing_enabled) {
+  metro_driver::PrintHandler::EnablePrinting(!!printing_enabled);
+}
+
+void MetroSetPrintPageCount(size_t page_count) {
+  DVLOG(1) << __FUNCTION__ << " Page count: " << page_count;
+  metro_driver::PrintHandler::SetPageCount(page_count);
+}
+
+void MetroSetPrintPageContent(size_t page_number,
+                              void* data,
+                              size_t data_size) {
+  DVLOG(1) << __FUNCTION__ << " Page number: " << page_number;
+  DCHECK(data != NULL);
+  DCHECK(data_size > 0);
+  mswr::ComPtr<IStream> metafile_stream;
+  HRESULT hr = ::CreateStreamOnHGlobal(
+      NULL, TRUE, metafile_stream.GetAddressOf());
+  if (metafile_stream.Get() != NULL) {
+    ULONG bytes_written = 0;
+    hr = metafile_stream->Write(data, data_size, &bytes_written);
+    LOG_IF(ERROR, FAILED(hr)) << "Failed to Write to Stream " << std::hex << hr;
+    DCHECK(bytes_written == data_size);
+
+    metro_driver::PrintHandler::AddPage(page_number, metafile_stream.Get());
+  } else {
+    NOTREACHED() << "Failed to CreateStreamOnHGlobal " << std::hex << hr;
+  }
+}
+
+void MetroShowPrintUI() {
+  metro_driver::PrintHandler::ShowPrintUI();
+}
diff --git a/win8/metro_driver/print_handler.h b/win8/metro_driver/print_handler.h
new file mode 100644
index 0000000..f0779cf
--- /dev/null
+++ b/win8/metro_driver/print_handler.h
@@ -0,0 +1,116 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_PRINT_HANDLER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_PRINT_HANDLER_H_
+
+#include <windows.media.playto.h>
+#include <windows.graphics.printing.h>
+#include <windows.ui.core.h>
+
+#include "base/synchronization/lock.h"
+#include "base/threading/thread.h"
+#include "win8/metro_driver/print_document_source.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+namespace base {
+
+class Lock;
+
+}  // namespace base
+
+namespace metro_driver {
+
+// This class handles the print aspect of the devices charm.
+class PrintHandler {
+ public:
+  PrintHandler();
+  ~PrintHandler();
+
+  HRESULT Initialize(winui::Core::ICoreWindow* window);
+
+  // Called by the exported C functions.
+  static void EnablePrinting(bool printing_enabled);
+  static void SetPageCount(size_t page_count);
+  static void AddPage(size_t page_number, IStream* metafile_stream);
+  static void ShowPrintUI();
+
+ private:
+  // Callbacks from Metro.
+  HRESULT OnPrintRequested(
+      wingfx::Printing::IPrintManager* print_mgr,
+      wingfx::Printing::IPrintTaskRequestedEventArgs* event_args);
+
+  HRESULT OnPrintTaskSourceRequest(
+      wingfx::Printing::IPrintTaskSourceRequestedArgs* args);
+
+  HRESULT OnCompleted(wingfx::Printing::IPrintTask* task,
+                      wingfx::Printing::IPrintTaskCompletedEventArgs* args);
+  // Utility methods.
+  void ClearPrintTask();
+  float GetLogicalDpi();
+
+  // Callback from Metro and entry point called on lockable thread.
+  HRESULT LogicalDpiChanged(IInspectable *sender);
+  static void OnLogicalDpiChanged(float dpi);
+
+  // Called on the lockable thread to set/release the doc.
+  static void SetPrintDocumentSource(
+      const mswr::ComPtr<PrintDocumentSource>& print_document_source);
+  static void ReleasePrintDocumentSource();
+
+  // Called on the lockable thread for the exported C functions.
+  static void OnEnablePrinting(bool printing_enabled);
+  static void OnSetPageCount(size_t page_count);
+  static void OnAddPage(size_t page_number,
+                        mswr::ComPtr<IStream> metafile_stream);
+
+  // Opens the prit device charm. Must be called from the metro thread.
+  static void OnShowPrintUI();
+
+  mswr::ComPtr<wingfx::Printing::IPrintTask> print_task_;
+  EventRegistrationToken print_requested_token_;
+  EventRegistrationToken print_completed_token_;
+  EventRegistrationToken dpi_change_token_;
+
+  mswr::ComPtr<wingfx::Printing::IPrintManager> print_manager_;
+  PrintDocumentSource::DirectXContext directx_context_;
+
+  // Hack to give access to the Print Document from the C style entry points.
+  // This will go away once we can pass a pointer to this interface down to
+  // the Chrome Browser as we send the command to print.
+  static mswr::ComPtr<PrintDocumentSource> current_document_source_;
+
+  // Another hack to enable/disable printing from an exported C function.
+  // TODO(mad): Find a better way to do this...
+  static bool printing_enabled_;
+
+  // This is also a temporary hack until we can pass down the print document
+  // to Chrome so it can call directly into it. We need to lock the access to
+  // current_document_source_.
+  static base::Lock* lock_;
+
+  // This thread is used to send blocking jobs
+  // out of threads we don't want to block.
+  static base::Thread* thread_;
+};
+
+}  // namespace metro_driver
+
+// Exported C functions for Chrome to call into the Metro module.
+extern "C" __declspec(dllexport)
+void MetroEnablePrinting(BOOL printing_enabled);
+
+extern "C" __declspec(dllexport)
+void MetroSetPrintPageCount(size_t page_count);
+
+extern "C" __declspec(dllexport)
+void MetroSetPrintPageContent(size_t current_page,
+                              void* data,
+                              size_t data_size);
+
+extern "C" __declspec(dllexport)
+void MetroShowPrintUI();
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_PRINT_HANDLER_H_
diff --git a/win8/metro_driver/run_all_unittests.cc b/win8/metro_driver/run_all_unittests.cc
new file mode 100644
index 0000000..4c6a548
--- /dev/null
+++ b/win8/metro_driver/run_all_unittests.cc
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "stdafx.h"
+
+#include "base/at_exit.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#pragma comment(lib, "runtimeobject.lib")
+
+base::AtExitManager at_exit;
+
+int main(int argc, char** argv) {
+  mswrw::RoInitializeWrapper ro_init(RO_INIT_SINGLETHREADED);
+
+  testing::InitGoogleTest(&argc, argv);
+
+  return RUN_ALL_TESTS();
+}
diff --git a/win8/metro_driver/secondary_tile.cc b/win8/metro_driver/secondary_tile.cc
new file mode 100644
index 0000000..8a54bd7
--- /dev/null
+++ b/win8/metro_driver/secondary_tile.cc
@@ -0,0 +1,155 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "secondary_tile.h"
+
+#include <windows.ui.startscreen.h>
+
+#include "base/base_paths.h"
+#include "base/bind.h"
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/string_number_conversions.h"
+#include "base/utf_string_conversions.h"
+#include "crypto/sha2.h"
+#include "win8/metro_driver/chrome_app_view.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+namespace {
+
+string16 GenerateTileId(const string16& url_str) {
+  uint8 hash[crypto::kSHA256Length];
+  crypto::SHA256HashString(UTF16ToUTF8(url_str), hash, sizeof(hash));
+  std::string hash_str = base::HexEncode(hash, sizeof(hash));
+  return UTF8ToUTF16(hash_str);
+}
+
+string16 GetLogoUrlString() {
+  FilePath module_path;
+  PathService::Get(base::DIR_MODULE, &module_path);
+  string16 scheme(L"ms-appx:///");
+  return scheme.append(module_path.BaseName().value())
+               .append(L"/SecondaryTile.png");
+}
+
+BOOL IsPinnedToStartScreen(const string16& url_str) {
+  mswr::ComPtr<winui::StartScreen::ISecondaryTileStatics> tile_statics;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_StartScreen_SecondaryTile,
+      tile_statics.GetAddressOf());
+  CheckHR(hr, "Failed to create instance of ISecondaryTileStatics");
+
+  boolean exists;
+  hr = tile_statics->Exists(MakeHString(GenerateTileId(url_str)), &exists);
+  CheckHR(hr, "ISecondaryTileStatics.Exists failed");
+  return exists;
+}
+
+void DeleteTileFromStartScreen(const string16& url_str) {
+  DVLOG(1) << __FUNCTION__;
+  mswr::ComPtr<winui::StartScreen::ISecondaryTileFactory> tile_factory;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_StartScreen_SecondaryTile,
+      tile_factory.GetAddressOf());
+  CheckHR(hr, "Failed to create instance of ISecondaryTileFactory");
+
+  mswrw::HString id;
+  id.Attach(MakeHString(GenerateTileId(url_str)));
+
+  mswr::ComPtr<winui::StartScreen::ISecondaryTile> tile;
+  hr = tile_factory->CreateWithId(id.Get(), tile.GetAddressOf());
+  CheckHR(hr, "Failed to create tile");
+
+  mswr::ComPtr<winfoundtn::IAsyncOperation<bool>> completion;
+  hr = tile->RequestDeleteAsync(completion.GetAddressOf());
+  CheckHR(hr, "RequestDeleteAsync failed");
+
+  typedef winfoundtn::IAsyncOperationCompletedHandler<bool> RequestDoneType;
+  mswr::ComPtr<RequestDoneType> handler(mswr::Callback<RequestDoneType>(
+      globals.view, &ChromeAppView::TileRequestCreateDone));
+  DCHECK(handler.Get() != NULL);
+  hr = completion->put_Completed(handler.Get());
+  CheckHR(hr, "Failed to put_Completed");
+}
+
+void CreateTileOnStartScreen(const string16& title_str,
+                             const string16& url_str) {
+  VLOG(1) << __FUNCTION__;
+  mswr::ComPtr<winui::StartScreen::ISecondaryTileFactory> tile_factory;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_StartScreen_SecondaryTile,
+      tile_factory.GetAddressOf());
+  CheckHR(hr, "Failed to create instance of ISecondaryTileFactory");
+
+  winui::StartScreen::TileOptions options =
+      winui::StartScreen::TileOptions_ShowNameOnLogo;
+  mswrw::HString title;
+  title.Attach(MakeHString(title_str));
+  mswrw::HString id;
+  id.Attach(MakeHString(GenerateTileId(url_str)));
+  mswrw::HString args;
+  args.Attach(MakeHString(string16(L"url=").append(url_str)));
+
+  mswr::ComPtr<winfoundtn::IUriRuntimeClassFactory> uri_factory;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Foundation_Uri,
+      uri_factory.GetAddressOf());
+  CheckHR(hr, "Failed to create URIFactory");
+
+  mswrw::HString logo_url;
+  logo_url.Attach(MakeHString(GetLogoUrlString()));
+  mswr::ComPtr<winfoundtn::IUriRuntimeClass> uri;
+  hr = uri_factory->CreateUri(logo_url.Get(), &uri);
+  CheckHR(hr, "Failed to create URI");
+
+  mswr::ComPtr<winui::StartScreen::ISecondaryTile> tile;
+  hr = tile_factory->CreateTile(id.Get(),
+                                title.Get(),
+                                title.Get(),
+                                args.Get(),
+                                options,
+                                uri.Get(),
+                                tile.GetAddressOf());
+  CheckHR(hr, "Failed to create tile");
+
+  hr = tile->put_ForegroundText(winui::StartScreen::ForegroundText_Light);
+  CheckHR(hr, "Failed to change foreground text color");
+
+  mswr::ComPtr<winfoundtn::IAsyncOperation<bool>> completion;
+  hr = tile->RequestCreateAsync(completion.GetAddressOf());
+  CheckHR(hr, "RequestCreateAsync failed");
+
+  typedef winfoundtn::IAsyncOperationCompletedHandler<bool> RequestDoneType;
+  mswr::ComPtr<RequestDoneType> handler(mswr::Callback<RequestDoneType>(
+      globals.view, &ChromeAppView::TileRequestCreateDone));
+  DCHECK(handler.Get() != NULL);
+  hr = completion->put_Completed(handler.Get());
+  CheckHR(hr, "Failed to put_Completed");
+}
+
+void TogglePinnedToStartScreen(const string16& title_str,
+                               const string16& url_str) {
+  if (IsPinnedToStartScreen(url_str)) {
+    DeleteTileFromStartScreen(url_str);
+    return;
+  }
+
+  CreateTileOnStartScreen(title_str, url_str);
+}
+
+}  // namespace
+
+BOOL MetroIsPinnedToStartScreen(const string16& url) {
+  VLOG(1) << __FUNCTION__ << " url: " << url;
+  return IsPinnedToStartScreen(url);
+}
+
+void MetroTogglePinnedToStartScreen(const string16& title,
+                                    const string16& url) {
+  DVLOG(1) << __FUNCTION__ << " title:" << title << " url: " << url;
+  globals.appview_msg_loop->PostTask(
+      FROM_HERE, base::Bind(&TogglePinnedToStartScreen, title, url));
+}
diff --git a/win8/metro_driver/secondary_tile.h b/win8/metro_driver/secondary_tile.h
new file mode 100644
index 0000000..796e881
--- /dev/null
+++ b/win8/metro_driver/secondary_tile.h
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_SECONDARY_TILE_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_SECONDARY_TILE_H_
+
+#include "base/string16.h"
+
+extern "C" __declspec(dllexport)
+BOOL MetroIsPinnedToStartScreen(const string16& url);
+
+extern "C" __declspec(dllexport)
+void MetroTogglePinnedToStartScreen(const string16& title, const string16& url);
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_SECONDARY_TILE_H_
+
diff --git a/win8/metro_driver/settings_handler.cc b/win8/metro_driver/settings_handler.cc
new file mode 100644
index 0000000..6feae24
--- /dev/null
+++ b/win8/metro_driver/settings_handler.cc
@@ -0,0 +1,175 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "settings_handler.h"
+
+// This include allows to send WM_SYSCOMMANDs to chrome.
+#include "chrome/app/chrome_command_ids.h"
+#include "chrome_app_view.h"
+#include "winrt_utils.h"
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::ApplicationSettings::SettingsPane*,
+    winui::ApplicationSettings::SettingsPaneCommandsRequestedEventArgs*>
+        CommandsRequestedHandler;
+
+namespace {
+
+// String identifiers for the settings pane commands.
+const wchar_t* kSettingsId = L"settings";
+const wchar_t* kHelpId = L"help";
+const wchar_t* kAboutId = L"about";
+
+}
+
+SettingsHandler::SettingsHandler() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+SettingsHandler::~SettingsHandler() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+HRESULT SettingsHandler::Initialize() {
+  mswr::ComPtr<winui::ApplicationSettings::ISettingsPaneStatics>
+      settings_pane_statics;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_ApplicationSettings_SettingsPane,
+      settings_pane_statics.GetAddressOf());
+  CheckHR(hr, "Failed to activate ISettingsPaneStatics");
+
+  mswr::ComPtr<winui::ApplicationSettings::ISettingsPane> settings_pane;
+  hr = settings_pane_statics->GetForCurrentView(&settings_pane);
+  CheckHR(hr, "Failed to get ISettingsPane");
+
+  hr = settings_pane->add_CommandsRequested(
+      mswr::Callback<CommandsRequestedHandler>(
+          this,
+          &SettingsHandler::OnSettingsCommandsRequested).Get(),
+      &settings_token_);
+  CheckHR(hr, "Failed to add CommandsRequested");
+
+  return hr;
+}
+
+HRESULT SettingsHandler::OnSettingsCommandsRequested(
+    winui::ApplicationSettings::ISettingsPane* settings_pane,
+    winui::ApplicationSettings::ISettingsPaneCommandsRequestedEventArgs* args) {
+  mswr::ComPtr<winui::ApplicationSettings::ISettingsCommandFactory>
+      settings_command_factory;
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_ApplicationSettings_SettingsCommand,
+      settings_command_factory.GetAddressOf());
+  CheckHR(hr, "Failed to activate ISettingsCommandFactory");
+
+  mswr::ComPtr<winui::ApplicationSettings::ISettingsPaneCommandsRequest>
+      settings_command_request;
+  hr = args->get_Request(&settings_command_request);
+  CheckHR(hr, "Failed to get_Request");
+
+  mswr::ComPtr<SettingsHandler::ISettingsCommandVector> application_commands;
+  hr = settings_command_request->get_ApplicationCommands(&application_commands);
+  CheckHR(hr, "Failed to get_ApplicationCommands");
+
+  // TODO(mad): Internationalize the hard coded user visible strings.
+  hr = AppendNewSettingsCommand(
+      kSettingsId, L"Settings", settings_command_factory.Get(),
+      application_commands.Get());
+  CheckHR(hr, "Failed to append new settings command");
+
+  hr = AppendNewSettingsCommand(
+      kHelpId, L"Help", settings_command_factory.Get(),
+      application_commands.Get());
+  CheckHR(hr, "Failed to append new help command");
+
+  hr = AppendNewSettingsCommand(
+      kAboutId, L"About", settings_command_factory.Get(),
+      application_commands.Get());
+  CheckHR(hr, "Failed to append new about command");
+
+  return hr;
+}
+
+HRESULT SettingsHandler::AppendNewSettingsCommand(
+    const wchar_t* id,
+    const wchar_t* name,
+    winui::ApplicationSettings::ISettingsCommandFactory*
+        settings_command_factory,
+    SettingsHandler::ISettingsCommandVector* settings_command_vector) {
+  mswr::ComPtr<winfoundtn::IPropertyValue> settings_id;
+  HRESULT hr = GetSettingsId(id, &settings_id);
+  CheckHR(hr, "Can't get settings id");
+
+  mswrw::HString settings_name;
+  settings_name.Attach(MakeHString(name));
+  mswr::ComPtr<winui::Popups::IUICommand> command;
+  hr = settings_command_factory->CreateSettingsCommand(
+      settings_id.Get(),
+      settings_name.Get(),
+      mswr::Callback<winui::Popups::IUICommandInvokedHandler>(
+          &SettingsHandler::OnSettings).Get(),
+      command.GetAddressOf());
+  CheckHR(hr, "Can't create settings command");
+
+  hr = settings_command_vector->Append(command.Get());
+  CheckHR(hr, "Failed to append settings command");
+
+  return hr;
+}
+
+HRESULT SettingsHandler::OnSettings(winui::Popups::IUICommand* command) {
+  mswr::ComPtr<winfoundtn::IPropertyValue> settings_id;
+  HRESULT hr = GetSettingsId(kSettingsId, &settings_id);
+  CheckHR(hr, "Failed to get settings id");
+
+  mswr::ComPtr<winfoundtn::IPropertyValue> help_id;
+  hr = GetSettingsId(kHelpId, &help_id);
+  CheckHR(hr, "Failed to get settings id");
+
+  mswr::ComPtr<winfoundtn::IPropertyValue> about_id;
+  hr = GetSettingsId(kAboutId, &about_id);
+  CheckHR(hr, "Failed to get settings id");
+
+  mswr::ComPtr<winfoundtn::IPropertyValue> command_id;
+  hr = command->get_Id(&command_id);
+  CheckHR(hr, "Failed to get command id");
+
+  INT32 result = -1;
+  hr = winrt_utils::CompareProperties(
+      command_id.Get(), settings_id.Get(), &result);
+  CheckHR(hr, "Failed to compare ids");
+
+  HWND chrome_window = globals.host_windows.front().first;
+
+  if (result == 0) {
+    ::PostMessageW(chrome_window, WM_SYSCOMMAND, IDC_OPTIONS, 0);
+    return S_OK;
+  }
+
+  hr = winrt_utils::CompareProperties(command_id.Get(), help_id.Get(), &result);
+  CheckHR(hr, "Failed to compare ids");
+  if (result == 0) {
+    ::PostMessageW(chrome_window, WM_SYSCOMMAND, IDC_HELP_PAGE_VIA_MENU, 0);
+    return S_OK;
+  }
+
+  hr = winrt_utils::CompareProperties(
+      command_id.Get(), about_id.Get(), &result);
+  CheckHR(hr, "Failed to compare ids");
+  if (result == 0) {
+    ::PostMessageW(chrome_window, WM_SYSCOMMAND, IDC_ABOUT, 0);
+    return S_OK;
+  }
+
+  return S_OK;
+}
+
+HRESULT SettingsHandler::GetSettingsId(
+    const wchar_t* value, winfoundtn::IPropertyValue** settings_id) {
+  mswrw::HString property_value_string;
+  property_value_string.Attach(MakeHString(value));
+  return winrt_utils::CreateStringProperty(property_value_string.Get(),
+                                           settings_id);
+}
diff --git a/win8/metro_driver/settings_handler.h b/win8/metro_driver/settings_handler.h
new file mode 100644
index 0000000..5b234ad
--- /dev/null
+++ b/win8/metro_driver/settings_handler.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_SETTINGS_HANDLER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_SETTINGS_HANDLER_H_
+
+#include <windows.ui.applicationsettings.h>
+#include <windows.ui.popups.h>
+
+#include "winrt_utils.h"
+
+// This class handles the settings charm.
+class SettingsHandler {
+ public:
+  SettingsHandler();
+  ~SettingsHandler();
+
+  HRESULT Initialize();
+
+ private:
+  typedef winfoundtn::Collections::IVector<
+      winui::ApplicationSettings::SettingsCommand*> ISettingsCommandVector;
+
+  HRESULT OnSettingsCommandsRequested(
+      winui::ApplicationSettings::ISettingsPane* settings_pane,
+      winui::ApplicationSettings::
+          ISettingsPaneCommandsRequestedEventArgs* args);
+
+  HRESULT AppendNewSettingsCommand(
+      const wchar_t* id,
+      const wchar_t* name,
+      winui::ApplicationSettings::ISettingsCommandFactory*
+          settings_command_factory,
+      ISettingsCommandVector* settings_command_vector);
+
+  static HRESULT OnSettings(winui::Popups::IUICommand* command);
+  static HRESULT GetSettingsId(const wchar_t* value,
+                               winfoundtn::IPropertyValue** settings_id);
+
+  EventRegistrationToken settings_token_;
+};
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_SETTINGS_HANDLER_H_
diff --git a/win8/metro_driver/stdafx.h b/win8/metro_driver/stdafx.h
new file mode 100644
index 0000000..d8c1a01
--- /dev/null
+++ b/win8/metro_driver/stdafx.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_STDAFX_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_STDAFX_H_
+
+#include <wrl\implements.h>
+#include <wrl\module.h>
+#include <wrl\event.h>
+#include <wrl\wrappers\corewrappers.h>
+
+#include <activation.h>
+#include <d2d1_1.h>
+#include <d3d11_1.h>
+#include <roapi.h>
+#include <stdio.h>
+#include <wincodec.h>
+#include <windows.h>
+
+#include <windows.applicationmodel.core.h>
+#include <windows.applicationModel.datatransfer.h>
+#include <windows.graphics.printing.h>
+#include <windows.ui.notifications.h>
+
+namespace mswr = Microsoft::WRL;
+namespace mswrw = Microsoft::WRL::Wrappers;
+namespace winapp = ABI::Windows::ApplicationModel;
+namespace windata = ABI::Windows::Data;
+namespace winfoundtn = ABI::Windows::Foundation;
+namespace wingfx = ABI::Windows::Graphics;
+namespace winui = ABI::Windows::UI;
+namespace winxml = windata::Xml;
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_STDAFX_H_
diff --git a/win8/metro_driver/toast_notification_handler.cc b/win8/metro_driver/toast_notification_handler.cc
new file mode 100644
index 0000000..36bddd5
--- /dev/null
+++ b/win8/metro_driver/toast_notification_handler.cc
@@ -0,0 +1,234 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string>
+
+#include "win8/metro_driver/stdafx.h"
+#include "win8/metro_driver/toast_notification_handler.h"
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/utf_string_conversions.h"
+// TODO(ananta)
+// Refactor the chrome_util and shell_util code from chrome into a common lib
+#include "win8/delegate_execute/chrome_util.h"
+#include "win8/metro_driver/winrt_utils.h"
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::Notifications::ToastNotification*, IInspectable*>
+    ToastActivationHandler;
+
+typedef winfoundtn::ITypedEventHandler<
+    winui::Notifications::ToastNotification*,
+    winui::Notifications::ToastDismissedEventArgs*> ToastDismissedHandler;
+
+namespace {
+
+// Helper function to return the text node root identified by the index passed
+// in.
+HRESULT GetTextNodeRoot(
+    unsigned int index,
+    winxml::Dom::IXmlDocument* xml_doc,
+    winxml::Dom::IXmlNode** node) {
+  DCHECK(xml_doc);
+  DCHECK(node);
+
+  mswr::ComPtr<winxml::Dom::IXmlElement> document_element;
+  HRESULT hr = xml_doc->get_DocumentElement(&document_element);
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlNodeList> elements;
+  mswrw::HString tag_name;
+  tag_name.Attach(MakeHString(L"text"));
+  hr = document_element->GetElementsByTagName(tag_name.Get(),
+                                              &elements);
+  CheckHR(hr);
+
+  unsigned int count = 0;
+  elements->get_Length(&count);
+
+  if (index > count) {
+    DVLOG(1) << "Invalid text node index passed in : " << index;
+    return E_FAIL;
+  }
+  hr = elements->Item(index, node);
+  CheckHR(hr);
+  return hr;
+}
+
+// Helper function to append a text element to the text section in the
+// XML document passed in.
+// The index parameter identifies which text node we append to.
+HRESULT CreateTextNode(winxml::Dom::IXmlDocument* xml_doc,
+                       int index,
+                       const string16& text_string) {
+  DCHECK(xml_doc);
+
+  mswr::ComPtr<winxml::Dom::IXmlElement> document_element;
+  HRESULT hr = xml_doc->get_DocumentElement(&document_element);
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlText> xml_text_node;
+  mswrw::HString data_hstring;
+  data_hstring.Attach(MakeHString(text_string.c_str()));
+  hr = xml_doc->CreateTextNode(data_hstring.Get(), &xml_text_node);
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlNode> created_node;
+  hr = xml_text_node.CopyTo(
+      winxml::Dom::IID_IXmlNode,
+      reinterpret_cast<void**>(created_node.GetAddressOf()));
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlNode> text_node_root;
+  hr = GetTextNodeRoot(index, xml_doc, &text_node_root);
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlNode> appended_node;
+  hr = text_node_root->AppendChild(created_node.Get(), &appended_node);
+  CheckHR(hr);
+  return hr;
+}
+
+}  // namespace
+
+ToastNotificationHandler::DesktopNotification::DesktopNotification(
+    const char* notification_origin,
+    const char* notification_icon,
+    const wchar_t* notification_title,
+    const wchar_t* notification_body,
+    const wchar_t* notification_display_source,
+    const char* notification_id)
+    : origin_url(notification_origin),
+      icon_url(notification_icon),
+      title(notification_title),
+      body(notification_body),
+      display_source(notification_display_source),
+      id(notification_id) {
+}
+
+
+ToastNotificationHandler::ToastNotificationHandler() {
+  DVLOG(1) << __FUNCTION__;
+}
+
+ToastNotificationHandler::~ToastNotificationHandler() {
+  DVLOG(1) << __FUNCTION__;
+
+  if (notifier_ && notification_)
+    CancelNotification();
+}
+
+void ToastNotificationHandler::DisplayNotification(
+    const DesktopNotification& notification) {
+  DVLOG(1) << __FUNCTION__;
+
+  DCHECK(notifier_.Get() == NULL);
+  DCHECK(notification_.Get() == NULL);
+
+  mswr::ComPtr<winui::Notifications::IToastNotificationManagerStatics>
+      toast_manager;
+
+  HRESULT hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_Notifications_ToastNotificationManager,
+      toast_manager.GetAddressOf());
+  CheckHR(hr);
+
+  mswr::ComPtr<winxml::Dom::IXmlDocument> toast_xml;
+  hr = toast_manager->GetTemplateContent(
+      winui::Notifications::ToastTemplateType_ToastText02,
+      &toast_xml);
+  CheckHR(hr);
+
+  if (!toast_xml)
+    return;
+
+  mswr::ComPtr<winxml::Dom::IXmlElement> document_element;
+  hr = toast_xml->get_DocumentElement(&document_element);
+  CheckHR(hr);
+
+  if (!document_element)
+    return;
+
+  hr = CreateTextNode(toast_xml.Get(), 0, notification.title);
+  CheckHR(hr);
+
+  hr = CreateTextNode(toast_xml.Get(), 1, notification.body);
+  CheckHR(hr);
+
+  mswrw::HString duration_attribute_name;
+  duration_attribute_name.Attach(MakeHString(L"duration"));
+  mswrw::HString duration_attribute_value;
+  duration_attribute_value.Attach(MakeHString(L"long"));
+
+  hr = document_element->SetAttribute(duration_attribute_name.Get(),
+                                      duration_attribute_value.Get());
+  CheckHR(hr);
+
+  // TODO(ananta)
+  // We should set the image and launch params attribute in the notification
+  // XNL as described here: http://msdn.microsoft.com/en-us/library/hh465448
+  // To set the image we may have to extract the image and specify it in the
+  // following url form. ms-appx:///images/foo.png
+  // The launch params as described don't get passed back to us via the
+  // winapp::Activation::ILaunchActivatedEventArgs argument. Needs to be
+  // investigated.
+  mswr::ComPtr<winui::Notifications::IToastNotificationFactory>
+      toast_notification_factory;
+  hr = winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_UI_Notifications_ToastNotification,
+      toast_notification_factory.GetAddressOf());
+  CheckHR(hr);
+
+  hr = toast_notification_factory->CreateToastNotification(
+      toast_xml.Get(), &notification_);
+  CheckHR(hr);
+
+  FilePath chrome_path;
+  if (!PathService::Get(base::FILE_EXE, &chrome_path)) {
+    NOTREACHED() << "Failed to get chrome exe path";
+    return;
+  }
+  string16 appid = delegate_execute::GetAppId(chrome_path);
+  DVLOG(1) << "Chrome Appid is " << appid.c_str();
+
+  // TODO(ananta)
+  // We should probably use BrowserDistribution here to get the product name.
+  mswrw::HString app_user_model_id;
+  app_user_model_id.Attach(MakeHString(appid));
+
+  hr = toast_manager->CreateToastNotifierWithId(app_user_model_id.Get(),
+                                                &notifier_);
+  CheckHR(hr);
+
+  hr = notification_->add_Activated(
+      mswr::Callback<ToastActivationHandler>(
+          this, &ToastNotificationHandler::OnActivate).Get(),
+      &activated_token_);
+  CheckHR(hr);
+
+  hr = notifier_->Show(notification_.Get());
+  CheckHR(hr);
+}
+
+void ToastNotificationHandler::CancelNotification() {
+  DVLOG(1) << __FUNCTION__;
+
+  DCHECK(notifier_);
+  DCHECK(notification_);
+
+  notifier_->Hide(notification_.Get());
+}
+
+HRESULT ToastNotificationHandler::OnActivate(
+    winui::Notifications::IToastNotification* notification,
+    IInspectable* inspectable) {
+  // TODO(ananta)
+  // We should pass back information from the notification like the source url
+  // etc to ChromeAppView which would enable it to ensure that the
+  // correct tab in chrome is activated.
+  DVLOG(1) << __FUNCTION__;
+  return S_OK;
+}
diff --git a/win8/metro_driver/toast_notification_handler.h b/win8/metro_driver/toast_notification_handler.h
new file mode 100644
index 0000000..f560e34
--- /dev/null
+++ b/win8/metro_driver/toast_notification_handler.h
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_
+
+#include <windows.ui.notifications.h>
+
+#include "base/string16.h"
+
+// Provides functionality to display a metro style toast notification.
+class ToastNotificationHandler {
+ public:
+  // Holds information about a desktop notification to be displayed.
+  struct DesktopNotification {
+    std::string origin_url;
+    std::string icon_url;
+    string16 title;
+    string16 body;
+    string16 display_source;
+    std::string id;
+
+    DesktopNotification(const char* notification_origin,
+                        const char* notification_icon,
+                        const wchar_t* notification_title,
+                        const wchar_t* notification_body,
+                        const wchar_t* notification_display_source,
+                        const char* notification_id);
+  };
+
+  ToastNotificationHandler();
+  ~ToastNotificationHandler();
+
+  void DisplayNotification(const DesktopNotification& notification);
+  void CancelNotification();
+
+  HRESULT OnActivate(winui::Notifications::IToastNotification* notification,
+                     IInspectable* inspectable);
+
+ private:
+  mswr::ComPtr<winui::Notifications::IToastNotifier> notifier_;
+  mswr::ComPtr<winui::Notifications::IToastNotification> notification_;
+
+  EventRegistrationToken activated_token_;
+};
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_
diff --git a/win8/metro_driver/winrt_utils.cc b/win8/metro_driver/winrt_utils.cc
new file mode 100644
index 0000000..cfddc5e
--- /dev/null
+++ b/win8/metro_driver/winrt_utils.cc
@@ -0,0 +1,225 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "stdafx.h"
+#include "winrt_utils.h"
+
+#include <shlobj.h>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/win/scoped_com_initializer.h"
+#include "base/win/scoped_comptr.h"
+
+void CheckHR(HRESULT hr, const char* message) {
+  if (FAILED(hr)) {
+    if (message)
+      PLOG(DFATAL) << message << ", hr = " << std::hex << hr;
+    else
+      PLOG(DFATAL) << "COM ERROR" << ", hr = " << std::hex << hr;
+  }
+}
+
+HSTRING MakeHString(const string16& str) {
+  HSTRING hstr;
+  if (FAILED(::WindowsCreateString(str.c_str(), str.size(), &hstr))) {
+    PLOG(DFATAL) << "Hstring creation failed";
+  }
+  return hstr;
+}
+
+string16 MakeStdWString(HSTRING hstring) {
+  const wchar_t* str;
+  UINT32 size = 0;
+  str = ::WindowsGetStringRawBuffer(hstring, &size);
+  if (!size)
+    return string16();
+  return string16(str, size);
+}
+
+namespace {
+
+#define IMPLEMENT_CREATE_PROPERTY(Name, Type) \
+HRESULT Create ## Name ## Property(Type value, \
+                                   winfoundtn::IPropertyValue** prop) { \
+  mswr::ComPtr<winfoundtn::IPropertyValueStatics> property_value_statics; \
+  HRESULT hr = winrt_utils::CreateActivationFactory( \
+      RuntimeClass_Windows_Foundation_PropertyValue, \
+      property_value_statics.GetAddressOf()); \
+  CheckHR(hr, "Can't create IPropertyValueStatics"); \
+  hr = property_value_statics->Create ## Name ## ( \
+      value, \
+      reinterpret_cast<IInspectable**>(prop)); \
+  CheckHR(hr, "Failed to create Property"); \
+  return hr; \
+}
+
+#define COMPARE_ATOMIC_PROPERTY_VALUES(Name, Type) \
+  Type lhs_value; \
+  hr = lhs->Get ## Name ##(&lhs_value); \
+  CheckHR(hr, "Can't get value for lhs"); \
+  Type rhs_value; \
+  hr = rhs->Get ## Name ##(&rhs_value); \
+  CheckHR(hr, "Can't get value for rhs"); \
+  if (lhs_value < rhs_value) \
+    *result = -1; \
+  else if (lhs_value > rhs_value) \
+    *result = 1; \
+  else \
+    *result = 0; \
+  hr = S_OK
+
+}  // namespace
+
+namespace winrt_utils {
+
+IMPLEMENT_CREATE_PROPERTY(String, HSTRING);
+IMPLEMENT_CREATE_PROPERTY(Int16, INT16);
+IMPLEMENT_CREATE_PROPERTY(Int32, INT32);
+IMPLEMENT_CREATE_PROPERTY(Int64, INT64);
+IMPLEMENT_CREATE_PROPERTY(UInt8, UINT8);
+IMPLEMENT_CREATE_PROPERTY(UInt16, UINT16);
+IMPLEMENT_CREATE_PROPERTY(UInt32, UINT32);
+IMPLEMENT_CREATE_PROPERTY(UInt64, UINT64);
+
+HRESULT CompareProperties(winfoundtn::IPropertyValue* lhs,
+                          winfoundtn::IPropertyValue* rhs,
+                          INT32* result) {
+  if (result == nullptr) {
+    PLOG(DFATAL) << "Invalid argument to CompareProperties.";
+    return E_INVALIDARG;
+  }
+
+  if (lhs == rhs) {
+    *result = 0;
+    return S_OK;
+  }
+
+  winfoundtn::PropertyType lhs_property_type;
+  HRESULT hr = lhs->get_Type(&lhs_property_type);
+  if (FAILED(hr)) {
+    PLOG(DFATAL) << "Can't get property type for lhs, hr=" << std::hex << hr;
+  }
+
+  winfoundtn::PropertyType rhs_property_type;
+  hr = rhs->get_Type(&rhs_property_type);
+  CheckHR(hr, "Can't get property type for rhs");
+
+  if (lhs_property_type != rhs_property_type)
+    return E_INVALIDARG;
+
+  switch (lhs_property_type) {
+    case winfoundtn::PropertyType::PropertyType_String: {
+      mswrw::HString lhs_string;
+      hr = lhs->GetString(lhs_string.GetAddressOf());
+      CheckHR(hr, "Can't get string for lhs");
+
+      mswrw::HString rhs_string;
+      hr = rhs->GetString(rhs_string.GetAddressOf());
+      CheckHR(hr, "Can't get string for rhs");
+
+      hr = WindowsCompareStringOrdinal(
+          lhs_string.Get(), rhs_string.Get(), result);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_Char16: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(Char16, wchar_t);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_Double: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(Double, double);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_Int16: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(Int16, INT16);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_Int32: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(Int32, INT32);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_Int64: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(Int64, INT64);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_UInt8: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(UInt8, UINT8);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_UInt16: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(UInt16, UINT16);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_UInt32: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(UInt32, UINT32);
+      break;
+    }
+    case winfoundtn::PropertyType::PropertyType_UInt64: {
+      COMPARE_ATOMIC_PROPERTY_VALUES(UInt64, UINT64);
+      break;
+    }
+    default: {
+      hr = E_NOTIMPL;
+    }
+  }
+  return hr;
+}
+
+bool GetArgumentsFromShortcut(const FilePath& shortcut,
+                              string16* arguments) {
+  HRESULT result;
+  base::win::ScopedComPtr<IShellLink> i_shell_link;
+  bool is_resolved = false;
+
+
+  base::win::ScopedCOMInitializer sta_com_initializer;
+
+  // Get pointer to the IShellLink interface
+  result = i_shell_link.CreateInstance(CLSID_ShellLink, NULL,
+                                       CLSCTX_INPROC_SERVER);
+  if (SUCCEEDED(result)) {
+    base::win::ScopedComPtr<IPersistFile> persist;
+    // Query IShellLink for the IPersistFile interface
+    result = persist.QueryFrom(i_shell_link);
+    if (SUCCEEDED(result)) {
+      WCHAR temp_arguments[MAX_PATH];
+      // Load the shell link
+      result = persist->Load(shortcut.value().c_str(), STGM_READ);
+      if (SUCCEEDED(result)) {
+        result = i_shell_link->GetArguments(temp_arguments, MAX_PATH);
+        *arguments = temp_arguments;
+        is_resolved = true;
+      }
+    }
+  }
+
+  return is_resolved;
+}
+
+string16 ReadArgumentsFromPinnedTaskbarShortcut() {
+  wchar_t path_buffer[MAX_PATH] = {};
+
+  if (SUCCEEDED(SHGetFolderPath(NULL, CSIDL_APPDATA, NULL,
+                                SHGFP_TYPE_CURRENT, path_buffer))) {
+    FilePath shortcut(path_buffer);
+    shortcut = shortcut.Append(
+        L"Microsoft\\Internet Explorer\\Quick Launch\\User Pinned\\TaskBar");
+
+    // TODO(robertshield): Get this stuff from BrowserDistribution.
+#if defined(GOOGLE_CHROME_BUILD)
+    shortcut = shortcut.Append(L"Google Chrome.lnk");
+#else
+    shortcut = shortcut.Append(L"Chromium.lnk");
+#endif
+
+    string16 arguments;
+    if (GetArgumentsFromShortcut(shortcut, &arguments)) {
+      return arguments;
+    }
+  }
+
+  return L"";
+}
+
+}  // namespace winrt_utils
diff --git a/win8/metro_driver/winrt_utils.h b/win8/metro_driver/winrt_utils.h
new file mode 100644
index 0000000..28f1ead
--- /dev/null
+++ b/win8/metro_driver/winrt_utils.h
@@ -0,0 +1,60 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_METRO_DRIVER_WINRT_UTILS_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_WINRT_UTILS_H_
+
+#include <string>
+
+#include <roapi.h>
+#include <windows.applicationmodel.core.h>
+
+#include "base/string16.h"
+
+void CheckHR(HRESULT hr, const char* str = nullptr);
+
+HSTRING MakeHString(const string16& str);
+
+string16 MakeStdWString(HSTRING hstring);
+
+namespace winrt_utils {
+
+template<unsigned int size, typename T>
+HRESULT CreateActivationFactory(wchar_t const (&class_name)[size], T** object) {
+  mswrw::HStringReference ref_class_name(class_name);
+  return winfoundtn::GetActivationFactory(ref_class_name.Get(), object);
+}
+
+#define DECLARE_CREATE_PROPERTY(Name, Type) \
+HRESULT Create ## Name ## Property( \
+    Type value, \
+    winfoundtn::IPropertyValue** prop);
+
+DECLARE_CREATE_PROPERTY(String, HSTRING);
+DECLARE_CREATE_PROPERTY(Int16, INT16);
+DECLARE_CREATE_PROPERTY(Int32, INT32);
+DECLARE_CREATE_PROPERTY(Int64, INT64);
+DECLARE_CREATE_PROPERTY(UInt8, UINT8);
+DECLARE_CREATE_PROPERTY(UInt16, UINT16);
+DECLARE_CREATE_PROPERTY(UInt32, UINT32);
+DECLARE_CREATE_PROPERTY(UInt64, UINT64);
+
+// Compares |lhs| with |rhs| and return the |result| as
+// WindowsCompareStringOrdinal would do, i.e.,
+// -1 if |lhs| is less than |rhs|, 0 if they are equal, and
+// +1 if |lhs| is greater than |rhs|.
+HRESULT CompareProperties(
+    winfoundtn::IPropertyValue* lhs, winfoundtn::IPropertyValue* rhs,
+    INT32* result);
+
+// Looks for a pinned taskbar shortcut in the current user's profile. If it
+// finds one, will return any arguments that have been appended to the
+// shortcut's command line. This is intended for scenarios where those shortcut
+// parameters are ordinarily ignored (i.e. metro apps on win8). Returns an
+// empty string on failure.
+string16 ReadArgumentsFromPinnedTaskbarShortcut();
+
+}  // namespace winrt_utils
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_WINRT_UTILS_H_
diff --git a/win8/metro_driver/winrt_utils_unittest.cc b/win8/metro_driver/winrt_utils_unittest.cc
new file mode 100644
index 0000000..9ae869b
--- /dev/null
+++ b/win8/metro_driver/winrt_utils_unittest.cc
@@ -0,0 +1,115 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "stdafx.h"
+
+#include "winrt_utils.h"
+
+#include "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+template <typename Type>
+static HRESULT CreateProperty(Type value, winfoundtn::IPropertyValue** prop) {
+  return E_NOTIMPL;
+}
+
+template <>
+static HRESULT CreateProperty<const wchar_t*>(
+    const wchar_t* value, winfoundtn::IPropertyValue** prop) {
+  mswrw::HString string_value;
+  string_value.Attach(MakeHString(value));
+  return winrt_utils::CreateStringProperty(string_value.Get(), prop);
+}
+
+template <>
+static HRESULT CreateProperty<INT16>(INT16 value,
+                                     winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateInt16Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<INT32>(INT32 value,
+                                     winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateInt32Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<INT64>(INT64 value,
+                                     winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateInt64Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<UINT8>(UINT8 value,
+                                     winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateUInt8Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<UINT16>(UINT16 value,
+                                      winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateUInt16Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<UINT32>(UINT32 value,
+                                      winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateUInt32Property(value, prop);
+}
+
+template <>
+static HRESULT CreateProperty<UINT64>(UINT64 value,
+                                      winfoundtn::IPropertyValue** prop) {
+  return winrt_utils::CreateUInt64Property(value, prop);
+}
+
+template<typename Type>
+void TestCompareProperties(Type value1, Type value2) {
+  mswr::ComPtr<winfoundtn::IPropertyValue> property_1;
+  HRESULT hr = CreateProperty<Type>(value1, property_1.GetAddressOf());
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't create Property value 1";
+
+  mswr::ComPtr<winfoundtn::IPropertyValue> other_property_1;
+  hr = CreateProperty<Type>(value1, other_property_1.GetAddressOf());
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't create another Property value 1";
+
+  mswr::ComPtr<winfoundtn::IPropertyValue> property_2;
+  hr = CreateProperty<Type>(value2, property_2.GetAddressOf());
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't create Property value 2";
+
+  INT32 result = 42;
+  hr = winrt_utils::CompareProperties(
+      property_1.Get(), property_1.Get(), &result);
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't compare property_1 to itself";
+  EXPECT_EQ(0, result) << "Bad result value while comparing same property";
+
+  hr = winrt_utils::CompareProperties(
+      property_1.Get(), other_property_1.Get(), &result);
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't compare property_1 to other_property_1";
+  EXPECT_EQ(0, result) << "Bad result while comparing equal values";
+
+  hr = winrt_utils::CompareProperties(
+      property_1.Get(), property_2.Get(), &result);
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't compare property_1 to property_2";
+  EXPECT_EQ(-1, result) << "Bad result while comparing values for less than";
+
+  hr = winrt_utils::CompareProperties(
+      property_2.Get(), property_1.Get(), &result);
+  ASSERT_TRUE(SUCCEEDED(hr)) << "Can't compare property_1 to property_2";
+  EXPECT_EQ(1, result) << "Bad result value while comparing for greater than";
+}
+
+TEST(PropertyValueCompareTest, CompareProperties) {
+  TestCompareProperties<INT16>(42, 43);
+  TestCompareProperties<INT32>(42, 43);
+  TestCompareProperties<INT64>(42, 43);
+  TestCompareProperties<UINT8>(42, 43);
+  TestCompareProperties<UINT16>(42, 43);
+  TestCompareProperties<UINT32>(42, 43);
+  TestCompareProperties<UINT64>(42, 43);
+  TestCompareProperties<const wchar_t*>(L"abc", L"bcd");
+}
+
+}  // namespace
diff --git a/win8/win8.gyp b/win8/win8.gyp
new file mode 100644
index 0000000..bf64b1f
--- /dev/null
+++ b/win8/win8.gyp
@@ -0,0 +1,33 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'variables': {
+    'chromium_code': 1,
+  },
+  'includes': [
+    '../build/win_precompile.gypi',
+  ],
+  'targets': [
+    {
+      'target_name': 'check_sdk_patch',
+      'type': 'none',
+      'variables': {
+        'check_sdk_script': '<(DEPTH)/chrome/tools/build/win/check_sdk_patch.py',
+      },
+      'actions': [
+        {
+          'action_name': 'check_sdk_patch_action',
+          'inputs': [
+            '<@(windows_sdk_path)/Include/winrt/asyncinfo.h',
+          ],
+          'outputs': [
+            # This keeps the ninja build happy.
+            'dummy',
+          ],
+          'action': ['python', '<(check_sdk_script)', '<@(windows_sdk_path)'],
+        },
+      ],
+    },
+  ],
+}
\ No newline at end of file