Unify and clean up system download notifications, add Mountain Lion support.

BUG=138962
TEST=as in bug


Review URL: https://chromiumcodereview.appspot.com/10827207

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151195 0039d316-1c4b-4281-b951-d872f2087c98

15 files changed, 526 insertions, 294 deletions

diff --git a/chrome/browser/download/chrome_download_manager_delegate.cc b/chrome/browser/download/chrome_download_manager_delegate.cc
index 27e5988..3a909c7 100644
--- a/chrome/browser/download/chrome_download_manager_delegate.cc
+++ b/chrome/browser/download/chrome_download_manager_delegate.cc
@@ -60,10 +60,6 @@
 #include "chrome/browser/download/save_package_file_picker_chromeos.h"
 #endif
 
-#if defined(OS_WIN)
-#include "chrome/browser/download/download_completion_observer_win.h"
-#endif  // OS_WIN
-
 using content::BrowserContext;
 using content::BrowserThread;
 using content::DownloadId;
@@ -143,11 +139,6 @@ void ChromeDownloadManagerDelegate::SetDownloadManager(DownloadManager* dm) {
   extension_event_router_.reset(new ExtensionDownloadsEventRouter(
       profile_, download_manager_));
 #endif
-
-#if defined(OS_WIN)
-  DownloadCompletionObserver* download_completion =
-      new DownloadCompletionObserver(dm);
-#endif  // OS_WIN
 }
 
 void ChromeDownloadManagerDelegate::Shutdown() {
diff --git a/chrome/browser/download/download_completion_observer_win.cc b/chrome/browser/download/download_completion_observer_win.cc
deleted file mode 100644
index 809e896..0000000
--- a/chrome/browser/download/download_completion_observer_win.cc
+++ /dev/null
@@ -1,111 +0,0 @@
-// 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 "chrome/browser/download/download_completion_observer_win.h"
-
-#include <string>
-
-#include "base/logging.h"
-#include "base/stl_util.h"
-#include "base/string_number_conversions.h"
-#include "base/win/metro.h"
-#include "googleurl/src/gurl.h"
-#include "grit/generated_resources.h"
-#include "ui/base/l10n/l10n_util.h"
-
-using content::DownloadItem;
-using content::DownloadManager;
-
-static const char kDownloadNotificationPrefix[] = "DownloadNotification";
-int g_next_notification_id = 0;
-
-DownloadCompletionObserver::DownloadCompletionObserver(
-    DownloadManager* manager) {
-  manager->AddObserver(this);
-}
-
-DownloadCompletionObserver::~DownloadCompletionObserver() {
-  DCHECK(download_items_.empty());
-}
-
-void DownloadCompletionObserver::OnDownloadCreated(DownloadManager* manager,
-                                                   DownloadItem* download) {
-  if (download->IsInProgress()) {
-    download_items_.insert(download);
-    download->AddObserver(this);
-  }
-}
-
-void DownloadCompletionObserver::ManagerGoingDown(DownloadManager* manager) {
-  ClearDownloadItems();
-  manager->RemoveObserver(this);
-  delete this;
-}
-
-void DownloadCompletionObserver::OnDownloadUpdated(DownloadItem* download) {
-  switch (download->GetState()) {
-    case DownloadItem::COMPLETE: {
-      if (base::win::IsMetroProcess() &&
-          !download->GetOpenWhenComplete() &&
-          !download->ShouldOpenFileBasedOnExtension() &&
-          !download->IsTemporary() &&
-          !download->GetAutoOpened()) {
-        // In Windows 8 metro mode display a metro style notification which
-        // informs the user that the download is complete.
-        HMODULE metro = base::win::GetMetroModule();
-        base::win::MetroNotification display_notification =
-            reinterpret_cast< base::win::MetroNotification>(
-                ::GetProcAddress(metro, "DisplayNotification"));
-        DCHECK(display_notification);
-        if (display_notification) {
-          string16 title = l10n_util::GetStringUTF16(
-              IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION_TITLE);
-          string16 body = l10n_util::GetStringUTF16(
-              IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION);
-
-          // Dummy notification id. Every metro style notification needs a
-          // unique notification id.
-          std::string notification_id = kDownloadNotificationPrefix;
-          notification_id += base::IntToString(g_next_notification_id++);
-
-          display_notification(download->GetURL().spec().c_str(),
-                               "",
-                               title.c_str(),
-                               body.c_str(),
-                               L"",
-                               notification_id.c_str());
-        }
-      }
-      DCHECK(ContainsKey(download_items_, download));
-      download_items_.erase(download);
-      download->RemoveObserver(this);
-      break;
-    }
-
-    case DownloadItem::INTERRUPTED:
-    case DownloadItem::CANCELLED: {
-      DCHECK(ContainsKey(download_items_, download));
-      download_items_.erase(download);
-      download->RemoveObserver(this);
-      break;
-    }
-
-    default:
-      break;
-  }
-}
-
-void DownloadCompletionObserver::OnDownloadDestroyed(DownloadItem* download) {
-  DCHECK(ContainsKey(download_items_, download));
-  download_items_.erase(download);
-  download->RemoveObserver(this);
-}
-
-void DownloadCompletionObserver::ClearDownloadItems() {
-  for (std::set<DownloadItem*>::iterator it = download_items_.begin();
-       it != download_items_.end(); ++it) {
-    (*it)->RemoveObserver(this);
-  }
-  download_items_.clear();
-}
diff --git a/chrome/browser/download/download_completion_observer_win.h b/chrome/browser/download/download_completion_observer_win.h
deleted file mode 100644
index ceca491..0000000
--- a/chrome/browser/download/download_completion_observer_win.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// 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_DOWNLOAD_DOWNLOAD_COMPLETION_OBSERVER_WIN_H_
-#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_OBSERVER_WIN_H_
-
-#include <set>
-
-#include "base/basictypes.h"
-#include "content/public/browser/download_item.h"
-#include "content/public/browser/download_manager.h"
-
-// Tracks download item completions and notifies any interested parties
-// (Windows 8 metro) about the same. On Windows 8 we display metro style
-// notifications when a download completes.
-class DownloadCompletionObserver
-    : public content::DownloadManager::Observer,
-      public content::DownloadItem::Observer {
- public:
-  explicit DownloadCompletionObserver(content::DownloadManager* manager);
-  ~DownloadCompletionObserver();
-
-  // Methods inherited from content::DownloadManager::Observer.
-  virtual void OnDownloadCreated(
-      content::DownloadManager* manager, content::DownloadItem* download)
-      OVERRIDE;
-  virtual void ManagerGoingDown(content::DownloadManager* manager) OVERRIDE;
-
-  // Methods inherited from content::DownloadItem::Observer.
-  virtual void OnDownloadUpdated(content::DownloadItem* download) OVERRIDE;
-  virtual void OnDownloadDestroyed(content::DownloadItem* download) OVERRIDE;
-
- private:
-  void ClearDownloadItems();
-
-  std::set<content::DownloadItem*> download_items_;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadCompletionObserver);
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_COMPLETION_OBSERVER_WIN_H_
diff --git a/chrome/browser/download/download_status_updater.cc b/chrome/browser/download/download_status_updater.cc
index a8dde9b..489d3be 100644
--- a/chrome/browser/download/download_status_updater.cc
+++ b/chrome/browser/download/download_status_updater.cc
@@ -55,12 +55,19 @@ void DownloadStatusUpdater::ModelChanged(content::DownloadManager* manager) {
   std::vector<content::DownloadItem*> downloads;
   manager->SearchDownloads(string16(), &downloads);
 
+  std::vector<content::DownloadItem*> added_downloads;
   for (std::vector<content::DownloadItem*>::iterator it = downloads.begin();
        it != downloads.end(); ++it) {
-    UpdateItem(*it);
+    if (UpdateItem(*it))
+      added_downloads.push_back(*it);
   }
 
-  UpdateAppIconDownloadProgress();
+  for (std::vector<content::DownloadItem*>::iterator it =
+           added_downloads.begin();
+       it != added_downloads.end();
+       ++it) {
+    UpdateAppIconDownloadProgress(*it);
+  }
 }
 
 void DownloadStatusUpdater::ManagerGoingDown(
@@ -74,7 +81,7 @@ void DownloadStatusUpdater::ManagerGoingDown(
 void DownloadStatusUpdater::OnDownloadUpdated(
     content::DownloadItem* download) {
   UpdateItem(download);
-  UpdateAppIconDownloadProgress();
+  UpdateAppIconDownloadProgress(download);
 }
 
 void DownloadStatusUpdater::OnDownloadDestroyed(
@@ -83,30 +90,30 @@ void DownloadStatusUpdater::OnDownloadDestroyed(
     items_.erase(download);
     download->RemoveObserver(this);
   }
-  UpdateAppIconDownloadProgress();
+  UpdateAppIconDownloadProgress(download);
 }
 
 void DownloadStatusUpdater::OnDownloadOpened(content::DownloadItem* download) {
 }
 
-void DownloadStatusUpdater::UpdateAppIconDownloadProgress() {
-  float progress = 0;
-  int download_count = 0;
-  bool progress_known = GetProgress(&progress, &download_count);
-  download_util::UpdateAppIconDownloadProgress(download_count,
-                                               progress_known,
-                                               progress);
+#if defined(USE_AURA) || defined(OS_ANDROID)
+void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
+    content::DownloadItem* download) {
+  // TODO(davemoore): Implement once UX for aura download is decided <104742>
+  // TODO(avi): Implement for Android?
 }
+#endif
 
 // React to a transition that a download associated with one of our
 // download managers has made.  Our goal is to have only IN_PROGRESS
 // items on our set list, as they're the only ones that have relevance
 // to GetProgress() return values.
-void DownloadStatusUpdater::UpdateItem(content::DownloadItem* download) {
+bool DownloadStatusUpdater::UpdateItem(content::DownloadItem* download) {
   if (download->GetState() == content::DownloadItem::IN_PROGRESS) {
     if (!ContainsKey(items_, download)) {
       items_.insert(download);
       download->AddObserver(this);
+      return true;
     }
   } else {
     if (ContainsKey(items_, download)) {
@@ -114,4 +121,6 @@ void DownloadStatusUpdater::UpdateItem(content::DownloadItem* download) {
       download->RemoveObserver(this);
     }
   }
+
+  return false;
 }
diff --git a/chrome/browser/download/download_status_updater.h b/chrome/browser/download/download_status_updater.h
index 252be03..75218c5 100644
--- a/chrome/browser/download/download_status_updater.h
+++ b/chrome/browser/download/download_status_updater.h
@@ -42,12 +42,16 @@ class DownloadStatusUpdater
   virtual void OnDownloadDestroyed(content::DownloadItem* download) OVERRIDE;
 
  protected:
-  // Update the app icon. Virtual to be overridable for testing.
-  virtual void UpdateAppIconDownloadProgress();
+  // Platform-specific function to update the platform UI for download progress.
+  // |download| is the download item that changed. Implementations should not
+  // hold the value of |download| as it is not guaranteed to remain valid.
+  // Virtual to be overridable for testing.
+  virtual void UpdateAppIconDownloadProgress(content::DownloadItem* download);
 
  private:
-  // Update the internal state tracking an item.
-  void UpdateItem(content::DownloadItem* download);
+  // Update the internal state tracking an item. Returns true if the item was
+  // added to the set of tracked items.
+  bool UpdateItem(content::DownloadItem* download);
 
   std::set<content::DownloadManager*> managers_;
   std::set<content::DownloadItem*> items_;
diff --git a/chrome/browser/download/download_status_updater_gtk.cc b/chrome/browser/download/download_status_updater_gtk.cc
new file mode 100644
index 0000000..6f045fff76
--- /dev/null
+++ b/chrome/browser/download/download_status_updater_gtk.cc
@@ -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.
+
+#include "chrome/browser/download/download_status_updater.h"
+
+#include "chrome/browser/ui/gtk/unity_service.h"
+
+void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
+    content::DownloadItem* download) {
+  float progress = 0;
+  int download_count = 0;
+  GetProgress(&progress, &download_count);
+  unity::SetDownloadCount(download_count);
+  unity::SetProgressFraction(progress);
+}
diff --git a/chrome/browser/download/download_status_updater_mac.mm b/chrome/browser/download/download_status_updater_mac.mm
new file mode 100644
index 0000000..240f7eb
--- /dev/null
+++ b/chrome/browser/download/download_status_updater_mac.mm
@@ -0,0 +1,287 @@
+// 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 "chrome/browser/download/download_status_updater.h"
+
+#include "base/mac/foundation_util.h"
+#include "base/memory/scoped_nsobject.h"
+#include "base/supports_user_data.h"
+#include "base/sys_string_conversions.h"
+#include "content/public/browser/download_item.h"
+#import "chrome/browser/ui/cocoa/dock_icon.h"
+#include "googleurl/src/gurl.h"
+
+// --- Private 10.8 API for showing progress ---
+// rdar://12058866 http://www.openradar.me/12058866
+
+namespace {
+
+NSString* const kNSProgressAppBundleIdentifierKey =
+    @"NSProgressAppBundleIdentifierKey";
+NSString* const kNSProgressEstimatedTimeKey =
+    @"NSProgressEstimatedTimeKey";
+NSString* const kNSProgressFileCompletedCountKey =
+    @"NSProgressFileCompletedCountKey";
+NSString* const kNSProgressFileContainerURLKey =
+    @"NSProgressFileContainerURLKey";
+NSString* const kNSProgressFileDownloadingSourceURLKey =
+    @"NSProgressFileDownloadingSourceURLKey";
+NSString* const kNSProgressFileIconKey =
+    @"NSProgressFileIconKey";
+NSString* const kNSProgressFileIconOriginalRectKey =
+    @"NSProgressFileIconOriginalRectKey";
+NSString* const kNSProgressFileLocationCanChangeKey =
+    @"NSProgressFileLocationCanChangeKey";
+NSString* const kNSProgressFileOperationKindAirDropping =
+    @"NSProgressFileOperationKindAirDropping";
+NSString* const kNSProgressFileOperationKindCopying =
+    @"NSProgressFileOperationKindCopying";
+NSString* const kNSProgressFileOperationKindDecompressingAfterDownloading =
+    @"NSProgressFileOperationKindDecompressingAfterDownloading";
+NSString* const kNSProgressFileOperationKindDownloading =
+    @"NSProgressFileOperationKindDownloading";
+NSString* const kNSProgressFileOperationKindEncrypting =
+    @"NSProgressFileOperationKindEncrypting";
+NSString* const kNSProgressFileOperationKindKey =
+    @"NSProgressFileOperationKindKey";
+NSString* const kNSProgressFileTotalCountKey =
+    @"NSProgressFileTotalCountKey";
+NSString* const kNSProgressFileURLKey =
+    @"NSProgressFileURLKey";
+NSString* const kNSProgressIsWaitingKey =
+    @"NSProgressIsWaitingKey";
+NSString* const kNSProgressKindFile =
+    @"NSProgressKindFile";
+NSString* const kNSProgressThroughputKey =
+    @"NSProgressThroughputKey";
+
+NSString* ProgressString(NSString* string) {
+  static NSMutableDictionary* cache;
+  static CFBundleRef foundation;
+  if (!cache) {
+    cache = [[NSMutableDictionary alloc] init];
+    foundation = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.Foundation"));
+  }
+
+  NSString* result = [cache objectForKey:string];
+  if (!result) {
+    NSString** ref = static_cast<NSString**>(
+        CFBundleGetDataPointerForName(foundation,
+                                      base::mac::NSToCFCast(string)));
+    if (ref) {
+      result = *ref;
+      [cache setObject:result forKey:string];
+    }
+  }
+
+  return result;
+}
+
+}  // namespace
+
+@interface NSProgress : NSObject
+
+- (id)initWithParent:(id)parent userInfo:(NSDictionary*)info;
+@property(copy) NSString* kind;
+
+- (void)unpublish;
+- (void)publish;
+
+- (void)setUserInfoObject:(id)object forKey:(NSString*)key;
+- (NSDictionary*)userInfo;
+
+@property(readonly) double fractionCompleted;
+// Set the totalUnitCount to -1 to indicate an indeterminate download. The dock
+// shows a non-filling progress bar; the Finder is lame and draws its progress
+// bar off the right side.
+@property(readonly, getter=isIndeterminate) BOOL indeterminate;
+@property long long completedUnitCount;
+@property long long totalUnitCount;
+
+// Pausing appears to be unimplemented in 10.8.0.
+- (void)pause;
+@property(readonly, getter=isPaused) BOOL paused;
+@property(getter=isPausable) BOOL pausable;
+- (void)setPausingHandler:(id)blockOfUnknownSignature;
+
+- (void)cancel;
+@property(readonly, getter=isCancelled) BOOL cancelled;
+@property(getter=isCancellable) BOOL cancellable;
+// Note that the cancellation handler block will be called on a random thread.
+- (void)setCancellationHandler:(void (^)())block;
+
+// Allows other applications to provide feedback as to whether the progress is
+// visible in that app. Note that the acknowledgement handler block will be
+// called on a random thread.
+// com.apple.dock => BOOL indicating whether the download target folder was
+//                   successfully "flown to" at the beginning of the download.
+//                   This primarily depends on whether the download target
+//                   folder is in the dock. Note that if the download target
+//                   folder is added or removed from the dock during the
+//                   duration of the download, it will not trigger a callback.
+//                   Note that if the "fly to the dock" keys were not set, the
+//                   callback's parameter will always be NO.
+// com.apple.Finder => always YES, no matter whether the download target
+//                     folder's window is open.
+- (void)handleAcknowledgementByAppWithBundleIdentifier:(NSString*)bundle
+                                       usingBlock:(void (^)(BOOL success))block;
+
+@end
+
+// --- Private 10.8 API for showing progress ---
+
+namespace {
+
+bool NSProgressSupported() {
+  static bool supported;
+  static bool valid;
+  if (!valid) {
+    supported = NSClassFromString(@"NSProgress");
+    valid = true;
+  }
+
+  return supported;
+}
+
+const char kCrNSProgressUserDataKey[] = "CrNSProgressUserData";
+
+class CrNSProgressUserData : public base::SupportsUserData::Data {
+ public:
+  CrNSProgressUserData(NSProgress* progress, const FilePath& target)
+      : target_(target) {
+    progress_.reset(progress);
+  }
+  virtual ~CrNSProgressUserData() {}
+
+  NSProgress* progress() const { return progress_.get(); }
+  FilePath target() const { return target_; }
+  void setTarget(const FilePath& target) { target_ = target; }
+
+ private:
+  scoped_nsobject<NSProgress> progress_;
+  FilePath target_;
+};
+
+void UpdateAppIcon(int download_count,
+                   bool progress_known,
+                   float progress) {
+  DockIcon* dock_icon = [DockIcon sharedDockIcon];
+  [dock_icon setDownloads:download_count];
+  [dock_icon setIndeterminate:!progress_known];
+  [dock_icon setProgress:progress];
+  [dock_icon updateIcon];
+}
+
+void CreateNSProgress(content::DownloadItem* download) {
+  NSURL* source_url = [NSURL URLWithString:
+      base::SysUTF8ToNSString(download->GetURL().spec())];
+  FilePath destination_path = download->GetFullPath();
+  NSURL* destination_url = [NSURL fileURLWithPath:
+      base::mac::FilePathToNSString(destination_path)];
+
+  // If there were an image to fly to the download folder in the dock, then
+  // the keys in the userInfo to set would be:
+  // - @"NSProgressFlyToImageKey" : NSImage
+  // - kNSProgressFileIconOriginalRectKey : NSValue of NSRect in global coords
+
+  NSDictionary* user_info = @{
+    ProgressString(kNSProgressFileDownloadingSourceURLKey) : source_url,
+    ProgressString(kNSProgressFileLocationCanChangeKey) : @true,
+    ProgressString(kNSProgressFileOperationKindKey) :
+      ProgressString(kNSProgressFileOperationKindDownloading),
+    ProgressString(kNSProgressFileURLKey) : destination_url
+  };
+  Class progress_class = NSClassFromString(@"NSProgress");
+  NSProgress* progress = [progress_class performSelector:@selector(alloc)];
+  progress = [progress performSelector:@selector(initWithParent:userInfo:)
+                            withObject:nil
+                            withObject:user_info];
+  progress.kind = ProgressString(kNSProgressKindFile);
+
+  progress.pausable = NO;
+  progress.cancellable = YES;
+  [progress setCancellationHandler:^{
+      dispatch_async(dispatch_get_main_queue(), ^{
+          download->Cancel(true);
+      });
+  }];
+
+  progress.totalUnitCount = download->GetTotalBytes();
+  progress.completedUnitCount = download->GetReceivedBytes();
+
+  [progress publish];
+
+  download->SetUserData(&kCrNSProgressUserDataKey,
+                        new CrNSProgressUserData(progress, destination_path));
+}
+
+void UpdateNSProgress(content::DownloadItem* download,
+                      CrNSProgressUserData* progress_data) {
+  NSProgress* progress = progress_data->progress();
+  progress.totalUnitCount = download->GetTotalBytes();
+  progress.completedUnitCount = download->GetReceivedBytes();
+
+  FilePath download_path = download->GetFullPath();
+  if (progress_data->target() != download_path) {
+    progress_data->setTarget(download_path);
+    NSURL* download_url = [NSURL fileURLWithPath:
+        base::mac::FilePathToNSString(download_path)];
+    [progress setUserInfoObject:download_url
+                         forKey:ProgressString(kNSProgressFileURLKey)];
+  }
+}
+
+void DestroyNSProgress(content::DownloadItem* download,
+                       CrNSProgressUserData* progress_data) {
+  NSProgress* progress = progress_data->progress();
+  [progress unpublish];
+
+  download->RemoveUserData(&kCrNSProgressUserDataKey);
+}
+
+}  // namespace
+
+void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
+    content::DownloadItem* download) {
+
+  // Always update overall progress.
+
+  float progress = 0;
+  int download_count = 0;
+  bool progress_known = GetProgress(&progress, &download_count);
+  UpdateAppIcon(download_count, progress_known, progress);
+
+  // Update NSProgress-based indicators.
+
+  if (NSProgressSupported()) {
+    CrNSProgressUserData* progress_data = static_cast<CrNSProgressUserData*>(
+        download->GetUserData(&kCrNSProgressUserDataKey));
+    if (!progress_data)
+      CreateNSProgress(download);
+    else
+      UpdateNSProgress(download, progress_data);
+
+    if (download->GetState() != content::DownloadItem::IN_PROGRESS)
+      DestroyNSProgress(download, progress_data);
+  }
+
+  // Handle downloads that ended.
+  if (download->GetState() != content::DownloadItem::IN_PROGRESS) {
+    NSString* download_path =
+        base::mac::FilePathToNSString(download->GetFullPath());
+    if (download->GetState() == content::DownloadItem::COMPLETE) {
+      // Bounce the dock icon.
+      [[NSDistributedNotificationCenter defaultCenter]
+          postNotificationName:@"com.apple.DownloadFileFinished"
+                        object:download_path];
+    }
+
+    // Notify the Finder.
+    NSString* parent_path = [download_path stringByDeletingLastPathComponent];
+    FNNotifyByPath(
+        reinterpret_cast<const UInt8*>([parent_path fileSystemRepresentation]),
+        kFNDirectoryModifiedMessage,
+        kNilOptions);
+  }
+}
diff --git a/chrome/browser/download/download_status_updater_unittest.cc b/chrome/browser/download/download_status_updater_unittest.cc
index 6cc7ec03..7a36124 100644
--- a/chrome/browser/download/download_status_updater_unittest.cc
+++ b/chrome/browser/download/download_status_updater_unittest.cc
@@ -13,7 +13,6 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-
 using ::testing::AtLeast;
 using ::testing::Mock;
 using ::testing::Return;
@@ -22,10 +21,26 @@ using ::testing::StrictMock;
 using ::testing::_;
 
 class TestDownloadStatusUpdater : public DownloadStatusUpdater {
+ public:
+  TestDownloadStatusUpdater() : notification_count_(0),
+                                acceptable_notification_item_(NULL) {
+  }
+  void SetAcceptableNotificationItem(content::DownloadItem* item) {
+    acceptable_notification_item_ = item;
+  }
+  size_t NotificationCount() {
+    return notification_count_;
+  }
  protected:
-  virtual void UpdateAppIconDownloadProgress() OVERRIDE {
-    return;
+  virtual void UpdateAppIconDownloadProgress(
+      content::DownloadItem* download) OVERRIDE {
+    ++notification_count_;
+    if (acceptable_notification_item_)
+      EXPECT_EQ(acceptable_notification_item_, download);
   }
+ private:
+  size_t notification_count_;
+  content::DownloadItem* acceptable_notification_item_;
 };
 
 class DownloadStatusUpdaterTest : public testing::Test {
@@ -120,13 +135,16 @@ class DownloadStatusUpdaterTest : public testing::Test {
   }
 
   // Set return values relevant to |DownloadStatusUpdater::GetProgress()|
-  // for the specified item
+  // for the specified item.
   void SetItemValues(int manager_index, int item_index,
-                     int received_bytes, int total_bytes) {
-    EXPECT_CALL(*Item(manager_index, item_index), GetReceivedBytes())
+                     int received_bytes, int total_bytes, bool notify) {
+    content::MockDownloadItem* item(Item(manager_index, item_index));
+    EXPECT_CALL(*item, GetReceivedBytes())
         .WillRepeatedly(Return(received_bytes));
-    EXPECT_CALL(*Item(manager_index, item_index), GetTotalBytes())
+    EXPECT_CALL(*item, GetTotalBytes())
         .WillRepeatedly(Return(total_bytes));
+    if (notify)
+      updater_->OnDownloadUpdated(item);
   }
 
   // Transition specified item to completed.
@@ -157,7 +175,7 @@ class DownloadStatusUpdaterTest : public testing::Test {
 
   // Pointer so we can verify that destruction triggers appropriate
   // changes.
-  DownloadStatusUpdater *updater_;
+  TestDownloadStatusUpdater *updater_;
 
   // Thread so that the DownloadManager (which is a DeleteOnUIThread
   // object) can be deleted.
@@ -198,9 +216,9 @@ TEST_F(DownloadStatusUpdaterTest, OneManagerManyItems) {
   LinkManager(0);
 
   // Prime items
-  SetItemValues(0, 0, 10, 20);
-  SetItemValues(0, 1, 50, 60);
-  SetItemValues(0, 2, 90, 90);
+  SetItemValues(0, 0, 10, 20, false);
+  SetItemValues(0, 1, 50, 60, false);
+  SetItemValues(0, 2, 90, 90, false);
 
   float progress = -1;
   int download_count = -1;
@@ -218,13 +236,46 @@ TEST_F(DownloadStatusUpdaterTest, OneManagerManyItems) {
   // Add a new item to manager and confirm progress is updated properly.
   AddItems(0, 1, 1);
   updater_->ModelChanged(Manager(0));
-  SetItemValues(0, 3, 150, 200);
+  SetItemValues(0, 3, 150, 200, false);
 
   EXPECT_TRUE(updater_->GetProgress(&progress, &download_count));
   EXPECT_FLOAT_EQ((50+150)/(60+200.0f), progress);
   EXPECT_EQ(2, download_count);
 }
 
+// Test to ensure that the download progress notification is called correctly.
+TEST_F(DownloadStatusUpdaterTest, ProgressNotification) {
+  size_t expected_notifications = updater_->NotificationCount();
+  SetupManagers(1);
+  AddItems(0, 2, 2);
+  LinkManager(0);
+
+  // Expect two notifications, one for each item; which item will come first
+  // isn't defined so it cannot be tested.
+  expected_notifications += 2;
+  ASSERT_EQ(expected_notifications, updater_->NotificationCount());
+
+  // Make progress on the first item.
+  updater_->SetAcceptableNotificationItem(Item(0, 0));
+  SetItemValues(0, 0, 10, 20, true);
+  ++expected_notifications;
+  ASSERT_EQ(expected_notifications, updater_->NotificationCount());
+
+  // Second item completes!
+  updater_->SetAcceptableNotificationItem(Item(0, 1));
+  CompleteItem(0, 1);
+  ++expected_notifications;
+  ASSERT_EQ(expected_notifications, updater_->NotificationCount());
+
+  // First item completes.
+  updater_->SetAcceptableNotificationItem(Item(0, 0));
+  CompleteItem(0, 0);
+  ++expected_notifications;
+  ASSERT_EQ(expected_notifications, updater_->NotificationCount());
+
+  updater_->SetAcceptableNotificationItem(NULL);
+}
+
 // Confirm we recognize the situation where we have an unknown size.
 TEST_F(DownloadStatusUpdaterTest, UnknownSize) {
   SetupManagers(1);
@@ -232,8 +283,8 @@ TEST_F(DownloadStatusUpdaterTest, UnknownSize) {
   LinkManager(0);
 
   // Prime items
-  SetItemValues(0, 0, 10, 20);
-  SetItemValues(0, 1, 50, -1);
+  SetItemValues(0, 0, 10, 20, false);
+  SetItemValues(0, 1, 50, -1, false);
 
   float progress = -1;
   int download_count = -1;
@@ -276,9 +327,9 @@ TEST_F(DownloadStatusUpdaterTest, ManyManagersMixedItems) {
   AddItems(1, 3, 1);
   LinkManager(1);
 
-  SetItemValues(0, 0, 10, 20);
-  SetItemValues(0, 1, 50, 60);
-  SetItemValues(1, 0, 80, 90);
+  SetItemValues(0, 0, 10, 20, false);
+  SetItemValues(0, 1, 50, 60, false);
+  SetItemValues(1, 0, 80, 90, false);
 
   float progress = -1;
   int download_count = -1;
diff --git a/chrome/browser/download/download_status_updater_win.cc b/chrome/browser/download/download_status_updater_win.cc
new file mode 100644
index 0000000..3e28d6f
--- /dev/null
+++ b/chrome/browser/download/download_status_updater_win.cc
@@ -0,0 +1,123 @@
+// 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 "chrome/browser/download/download_status_updater.h"
+
+#include <string>
+#include <shobjidl.h>
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "base/string_number_conversions.h"
+#include "base/win/metro.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "googleurl/src/gurl.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+// This code doesn't compile with Aura on. TODO(avi): hook it up so that
+// win_aura can do platform integration.
+#if !defined(USE_AURA)
+
+namespace {
+
+const char kDownloadNotificationPrefix[] = "DownloadNotification";
+int g_next_notification_id = 0;
+
+void UpdateTaskbarProgressBar(int download_count,
+                              bool progress_known,
+                              float progress) {
+  // Taskbar progress bar is only supported on Win7.
+  if (base::win::GetVersion() < base::win::VERSION_WIN7)
+    return;
+
+  base::win::ScopedComPtr<ITaskbarList3> taskbar;
+  HRESULT result = taskbar.CreateInstance(CLSID_TaskbarList, NULL,
+                                          CLSCTX_INPROC_SERVER);
+  if (FAILED(result)) {
+    VLOG(1) << "Failed creating a TaskbarList object: " << result;
+    return;
+  }
+
+  result = taskbar->HrInit();
+  if (FAILED(result)) {
+    LOG(ERROR) << "Failed initializing an ITaskbarList3 interface.";
+    return;
+  }
+
+  // Iterate through all the browser windows, and draw the progress bar.
+  for (BrowserList::const_iterator browser_iterator = BrowserList::begin();
+      browser_iterator != BrowserList::end(); browser_iterator++) {
+    Browser* browser = *browser_iterator;
+    BrowserWindow* window = browser->window();
+    if (!window)
+      continue;
+    HWND frame = window->GetNativeWindow();
+    if (download_count == 0 || progress == 1.0f)
+      taskbar->SetProgressState(frame, TBPF_NOPROGRESS);
+    else if (!progress_known)
+      taskbar->SetProgressState(frame, TBPF_INDETERMINATE);
+    else
+      taskbar->SetProgressValue(frame, static_cast<int>(progress * 100), 100);
+  }
+}
+
+}  // namespace
+
+void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
+    content::DownloadItem* download) {
+
+  // Always update overall progress.
+
+  float progress = 0;
+  int download_count = 0;
+  bool progress_known = GetProgress(&progress, &download_count);
+  UpdateTaskbarProgressBar(download_count, progress_known, progress);
+
+  // Fire notifications when downloads complete.
+
+  if (!base::win::IsMetroProcess())
+    return;
+
+  if (download->GetState() != content::DownloadItem::COMPLETE)
+    return;
+
+  if (download->GetOpenWhenComplete() ||
+      download->ShouldOpenFileBasedOnExtension() ||
+      download->IsTemporary() ||
+      download->GetAutoOpened())
+    return;
+
+  // In Windows 8 metro mode display a metro style notification which
+  // informs the user that the download is complete.
+  HMODULE metro = base::win::GetMetroModule();
+  base::win::MetroNotification display_notification =
+      reinterpret_cast<base::win::MetroNotification>(
+          ::GetProcAddress(metro, "DisplayNotification"));
+  DCHECK(display_notification);
+  if (display_notification) {
+    string16 title = l10n_util::GetStringUTF16(
+        IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION_TITLE);
+    string16 body = l10n_util::GetStringUTF16(
+        IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION);
+
+    // Dummy notification id. Every metro style notification needs a
+    // unique notification id.
+    std::string notification_id = kDownloadNotificationPrefix;
+    notification_id += base::IntToString(g_next_notification_id++);
+
+    display_notification(download->GetURL().spec().c_str(),
+                         "",
+                         title.c_str(),
+                         body.c_str(),
+                         L"",
+                         notification_id.c_str());
+  }
+}
+
+#endif  // !USE_AURA
diff --git a/chrome/browser/download/download_util.cc b/chrome/browser/download/download_util.cc
index b5a6a2e..7b940aa 100644
--- a/chrome/browser/download/download_util.cc
+++ b/chrome/browser/download/download_util.cc
@@ -27,8 +27,6 @@
 #include "chrome/browser/download/download_extensions.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_window.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/time_format.h"
@@ -52,12 +50,6 @@
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/rect.h"
 
-#if defined(OS_WIN)
-#include <shobjidl.h>
-
-#include "base/win/windows_version.h"
-#endif
-
 #if defined(TOOLKIT_VIEWS)
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_utils.h"
@@ -68,12 +60,9 @@
 
 #if defined(TOOLKIT_GTK)
 #include "chrome/browser/ui/gtk/custom_drag.h"
-#include "chrome/browser/ui/gtk/unity_service.h"
 #endif  // defined(TOOLKIT_GTK)
 
 #if defined(OS_WIN) && !defined(USE_AURA)
-#include "base/win/scoped_comptr.h"
-#include "chrome/browser/ui/browser_list.h"
 #include "ui/base/dragdrop/drag_source.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
 #endif
@@ -554,53 +543,6 @@ string16 GetProgressStatusText(DownloadItem* download) {
                                     speed_text, amount, time_remaining);
 }
 
-#if !defined(OS_MACOSX)
-void UpdateAppIconDownloadProgress(int download_count,
-                                   bool progress_known,
-                                   float progress) {
-#if defined(USE_AURA)
-  // TODO(davemoore) Implement once UX for download is decided <104742>
-#elif defined(OS_WIN)
-  // Taskbar progress bar is only supported on Win7.
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return;
-
-  base::win::ScopedComPtr<ITaskbarList3> taskbar;
-  HRESULT result = taskbar.CreateInstance(CLSID_TaskbarList, NULL,
-                                          CLSCTX_INPROC_SERVER);
-  if (FAILED(result)) {
-    VLOG(1) << "Failed creating a TaskbarList object: " << result;
-    return;
-  }
-
-  result = taskbar->HrInit();
-  if (FAILED(result)) {
-    LOG(ERROR) << "Failed initializing an ITaskbarList3 interface.";
-    return;
-  }
-
-  // Iterate through all the browser windows, and draw the progress bar.
-  for (BrowserList::const_iterator browser_iterator = BrowserList::begin();
-      browser_iterator != BrowserList::end(); browser_iterator++) {
-    Browser* browser = *browser_iterator;
-    BrowserWindow* window = browser->window();
-    if (!window)
-      continue;
-    HWND frame = window->GetNativeWindow();
-    if (download_count == 0 || progress == 1.0f)
-      taskbar->SetProgressState(frame, TBPF_NOPROGRESS);
-    else if (!progress_known)
-      taskbar->SetProgressState(frame, TBPF_INDETERMINATE);
-    else
-      taskbar->SetProgressValue(frame, static_cast<int>(progress * 100), 100);
-  }
-#elif defined(TOOLKIT_GTK)
-  unity::SetDownloadCount(download_count);
-  unity::SetProgressFraction(progress);
-#endif
-}
-#endif
-
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
   return FilePath(suggested_path.value() + FILE_PATH_LITERAL(".crdownload"));
 }
diff --git a/chrome/browser/download/download_util.h b/chrome/browser/download/download_util.h
index cb1bdac..ddbfba8 100644
--- a/chrome/browser/download/download_util.h
+++ b/chrome/browser/download/download_util.h
@@ -138,15 +138,6 @@ base::DictionaryValue* CreateDownloadItemValue(content::DownloadItem* download,
 // Get the localized status text for an in-progress download.
 string16 GetProgressStatusText(content::DownloadItem* download);
 
-// Update the application icon to indicate overall download progress.
-// |download_count| is the number of downloads currently in progress. If
-// |progress_known| is false, then at least one download is of indeterminate
-// size and |progress| is invalid, otherwise |progress| indicates the overall
-// download progress (float value from 0..1).
-void UpdateAppIconDownloadProgress(int download_count,
-                                   bool progress_known,
-                                   float progress);
-
 // Returns a .crdownload intermediate path for the |suggested_path|.
 FilePath GetCrDownloadPath(const FilePath& suggested_path);
 
diff --git a/chrome/browser/ui/cocoa/download/download_item_mac.mm b/chrome/browser/ui/cocoa/download/download_item_mac.mm
index 3a622b4..741575b 100644
--- a/chrome/browser/ui/cocoa/download/download_item_mac.mm
+++ b/chrome/browser/ui/cocoa/download/download_item_mac.mm
@@ -8,7 +8,6 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_item_model.h"
 #import "chrome/browser/ui/cocoa/download/download_item_controller.h"
-#include "chrome/browser/ui/cocoa/download/download_util_mac.h"
 #include "content/public/browser/download_item.h"
 #include "ui/gfx/image/image.h"
 
@@ -51,7 +50,6 @@ void DownloadItemMac::OnDownloadUpdated(content::DownloadItem* download) {
         [item_controller_ remove];  // We're deleted now!
         return;
       }
-      download_util::NotifySystemOfDownloadComplete(download->GetFullPath());
       // fall through
     case DownloadItem::IN_PROGRESS:
     case DownloadItem::CANCELLED:
diff --git a/chrome/browser/ui/cocoa/download/download_util_mac.h b/chrome/browser/ui/cocoa/download/download_util_mac.h
index 5fe53d4..968f1a1c 100644
--- a/chrome/browser/ui/cocoa/download/download_util_mac.h
+++ b/chrome/browser/ui/cocoa/download/download_util_mac.h
@@ -15,10 +15,6 @@ namespace download_util {
 
 void AddFileToPasteboard(NSPasteboard* pasteboard, const FilePath& path);
 
-// Notify the system that a download completed. This will cause the download
-// folder in the dock to bounce.
-void NotifySystemOfDownloadComplete(const FilePath& path);
-
 }  // namespace download_util
 
 #endif  // CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_UTIL_MAC_H_
diff --git a/chrome/browser/ui/cocoa/download/download_util_mac.mm b/chrome/browser/ui/cocoa/download/download_util_mac.mm
index 17e4826b..fe56ebd 100644
--- a/chrome/browser/ui/cocoa/download/download_util_mac.mm
+++ b/chrome/browser/ui/cocoa/download/download_util_mac.mm
@@ -7,7 +7,6 @@
 #include "chrome/browser/ui/cocoa/download/download_util_mac.h"
 
 #include "base/sys_string_conversions.h"
-#import "chrome/browser/ui/cocoa/dock_icon.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
 #include "ui/gfx/image/image.h"
@@ -26,19 +25,6 @@ void AddFileToPasteboard(NSPasteboard* pasteboard, const FilePath& path) {
   [pasteboard setPropertyList:fileList forType:NSFilenamesPboardType];
 }
 
-void NotifySystemOfDownloadComplete(const FilePath& path) {
-  NSString* filePath = base::SysUTF8ToNSString(path.value());
-  [[NSDistributedNotificationCenter defaultCenter]
-      postNotificationName:@"com.apple.DownloadFileFinished"
-                    object:filePath];
-
-  NSString* parentPath = [filePath stringByDeletingLastPathComponent];
-  FNNotifyByPath(
-      reinterpret_cast<const UInt8*>([parentPath fileSystemRepresentation]),
-      kFNDirectoryModifiedMessage,
-      kNilOptions);
-}
-
 void DragDownload(const DownloadItem* download,
                   gfx::Image* icon,
                   gfx::NativeView view) {
@@ -69,14 +55,4 @@ void DragDownload(const DownloadItem* download,
                  slideBack:YES];
 }
 
-void UpdateAppIconDownloadProgress(int download_count,
-                                   bool progress_known,
-                                   float progress) {
-  DockIcon* dock_icon = [DockIcon sharedDockIcon];
-  [dock_icon setDownloads:download_count];
-  [dock_icon setIndeterminate:!progress_known];
-  [dock_icon setProgress:progress];
-  [dock_icon updateIcon];
-}
-
 }  // namespace download_util
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index dbff421..630befd 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1027,8 +1027,6 @@
         'browser/download/chrome_download_manager_delegate.h',
         'browser/download/download_completion_blocker.cc',
         'browser/download/download_completion_blocker.h',
-        'browser/download/download_completion_observer_win.cc',
-        'browser/download/download_completion_observer_win.h',
         'browser/download/download_crx_util.cc',
         'browser/download/download_crx_util.h',
         'browser/download/download_crx_util_android.cc',
@@ -1067,6 +1065,9 @@
         'browser/download/download_resource_throttle.h',
         'browser/download/download_status_updater.cc',
         'browser/download/download_status_updater.h',
+        'browser/download/download_status_updater_gtk.cc',
+        'browser/download/download_status_updater_mac.mm',
+        'browser/download/download_status_updater_win.cc',
         'browser/download/download_util.cc',
         'browser/download/download_util.h',
         'browser/download/save_package_file_picker.cc',