Added support for displaying the select folder picker in Chrome ASH on Windows 8.

The current behavior is that the select folder picker displays in desktop mode even when
when performed in ASH.

Fixes are as below:-
1. In the Chrome browser added plumbing in the SelectFileDialogImpl class to forward this
   operation of to the metro viewer process via the newly added function HandedSelectFolder
   which lives in the aura namespace in the remote_window_host_win.cc file.

2. In the metro viewer code added a new class FolderPickerSession which provides the functionality
   for displaying the metro select folder picker and returning the results from the same.

3. The following IPC messages provide the necessary functionality to funnel the request
   and the result between the browser and the metro viewer process.
   MetroViewerHostMsg_DisplaySelectFolder
   MetroViewerHostMsg_SelectFolderDone

I also added code to save away the metro root window in the RemoteRootWindowHostWin class
when we receive the MetroViewerHostMsg_SetTargetSurface IPC from the viewer process. We 
return this window in the RemoteRootWindowHostWin::GetAcceleratedWidget function. This
change although not needed for this CL seems correct. 

BUG=230087
R=cpu,sky

Review URL: https://codereview.chromium.org/14282002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195224 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 1 deletions

diff --git a/win8/metro_driver/chrome_app_view_ash.h b/win8/metro_driver/chrome_app_view_ash.h
index 6952d3d..e649f8d 100644
--- a/win8/metro_driver/chrome_app_view_ash.h
+++ b/win8/metro_driver/chrome_app_view_ash.h
@@ -10,6 +10,7 @@
 #include <windows.ui.input.h>
 #include <windows.ui.viewmanagement.h>
 
+#include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "ui/base/events/event_constants.h"
@@ -22,6 +23,8 @@ namespace IPC {
 
 class OpenFilePickerSession;
 class SaveFilePickerSession;
+class FolderPickerSession;
+class FilePickerSessionBase;
 
 struct MetroViewerHostMsg_SaveAsDialogParams;
 
@@ -45,10 +48,11 @@ class ChromeAppViewAsh
   void OnSetCursor(HCURSOR cursor);
   void OnDisplayFileOpenDialog(const string16& title,
                                const string16& filter,
-                               const string16& default_path,
+                               const base::FilePath& default_path,
                                bool allow_multiple_files);
   void OnDisplayFileSaveAsDialog(
       const MetroViewerHostMsg_SaveAsDialogParams& params);
+  void OnDisplayFolderPicker(const string16& title);
 
   // This function is invoked when the open file operation completes. The
   // result of the operation is passed in along with the OpenFilePickerSession
@@ -64,6 +68,13 @@ class ChromeAppViewAsh
   void OnSaveFileCompleted(SaveFilePickerSession* save_file_picker,
                            bool success);
 
+  // This function is invoked when the folder picker operation completes. The
+  // result of the operation is passed in along with the FolderPickerSession
+  // instance which is deleted after we read the required information from
+  // the FolderPickerSession class.
+  void OnFolderPickerCompleted(FolderPickerSession* folder_picker,
+                               bool success);
+
  private:
   HRESULT OnActivate(winapp::Core::ICoreApplicationView* view,
                      winapp::Activation::IActivatedEventArgs* args);
@@ -109,6 +120,7 @@ class ChromeAppViewAsh
   EventRegistrationToken visibility_changed_token_;
   EventRegistrationToken accel_keydown_token_;
   EventRegistrationToken accel_keyup_token_;
+  EventRegistrationToken window_activated_token_;
 
   // Keep state about which button is currently down, if any, as PointerMoved
   // events do not contain that state, but Ash's MouseEvents need it.