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

ui/aura/remote_root_window_host_win.h

 // 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 UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_
 #define UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 20 matching lines @@
 
 typedef base::Callback<void(const base::FilePath&, int, void*)>
     OpenFileCompletion;
 
 typedef base::Callback<void(const std::vector<base::FilePath>&, void*)>
     OpenMultipleFilesCompletion;
 
 typedef base::Callback<void(const base::FilePath&, int, void*)>
     SaveFileCompletion;
 
+typedef base::Callback<void(const base::FilePath&, int, void*)>
+    SelectFolderCompletion;
+
 // Handles the open file operation for Metro Chrome Ash. The callback passed in
 // is invoked when we receive the opened file name from the metro viewer.
 AURA_EXPORT void HandleOpenFile(
     const string16& title,
     const base::FilePath& default_path,
     const string16& filter,
     const OpenFileCompletion& callback);
 
 // Handles the open multiple file operation for Metro Chrome Ash. The callback
 // passed in is invoked when we receive the opened file names from the metro
 // viewer.
 AURA_EXPORT void HandleOpenMultipleFiles(
     const string16& title,
     const base::FilePath& default_path,
     const string16& filter,
     const OpenMultipleFilesCompletion& callback);
 
 // Handles the save file operation for Metro Chrome Ash. The callback passed in
 // is invoked when we receive the saved file name from the metro viewer.
 AURA_EXPORT void HandleSaveFile(
     const string16& title,
     const base::FilePath& default_path,
     const string16& filter,
     int filter_index,
     const string16& default_extension,
     const SaveFileCompletion& callback);
 
+// Handles the select folder for Metro Chrome Ash. The callback passed in
+// is invoked when we receive the folder name from the metro viewer.
+AURA_EXPORT void HandleSelectFolder(const string16& title,
+                                    const SelectFolderCompletion& callback);
 
 // RootWindowHost implementaton that receives events from a different
 // process. In the case of Windows this is the Windows 8 (aka Metro)
 // frontend process, which forwards input events to this class.
 class AURA_EXPORT RemoteRootWindowHostWin : public RootWindowHost {
  public:
   static RemoteRootWindowHostWin* Instance();
   static RemoteRootWindowHostWin* Create(const gfx::Rect& bounds);
 
   // Called when the remote process has established its IPC connection.
@@ skipping 18 matching lines @@
       const OpenMultipleFilesCompletion& callback);
 
   void HandleSaveFile(
       const string16& title,
       const base::FilePath& default_path,
       const string16& filter,
       int filter_index,
       const string16& default_extension,
       const SaveFileCompletion& callback);
 
+  void HandleSelectFolder(const string16& title,
+                          const SelectFolderCompletion& callback);
+
  private:
   explicit RemoteRootWindowHostWin(const gfx::Rect& bounds);
   virtual ~RemoteRootWindowHostWin();
 
   // IPC message handing methods:
   void OnMouseMoved(int32 x, int32 y, int32 flags);
   void OnMouseButton(int32 x,
                      int32 y,
                      int32 extra,
                      ui::EventType type,
                      ui::EventFlags flags);
   void OnKeyDown(uint32 vkey,
                  uint32 repeat_count,
                  uint32 scan_code,
                  uint32 flags);
   void OnKeyUp(uint32 vkey,
                uint32 repeat_count,
                uint32 scan_code,
                uint32 flags);
   void OnChar(uint32 key_code,
               uint32 repeat_count,
               uint32 scan_code,
               uint32 flags);
   void OnVisibilityChanged(bool visible);
   void OnTouchDown(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
   void OnTouchUp(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
   void OnTouchMoved(int32 x, int32 y, uint64 timestamp, uint32 pointer_id);
   void OnFileSaveAsDone(bool success,
-                        string16 filename,
+                        const base::FilePath& filename,
                         int filter_index);
-  void OnFileOpenDone(bool success, string16 filename);
+  void OnFileOpenDone(bool success, const base::FilePath& filename);
   void OnMultiFileOpenDone(bool success,
                            const std::vector<base::FilePath>& files);
-
+  void OnSelectFolderDone(bool success, const base::FilePath& folder);
   // RootWindowHost overrides:
   virtual void SetDelegate(RootWindowHostDelegate* delegate) OVERRIDE;
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void ToggleFullScreen() OVERRIDE;
   virtual gfx::Rect GetBounds() const OVERRIDE;
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual gfx::Insets GetInsets() const OVERRIDE;
@@ skipping 28 matching lines @@
                                uint32 repeat_count,
                                uint32 scan_code,
                                uint32 flags,
                                bool is_character);
 
   RootWindowHostDelegate* delegate_;
   IPC::Sender* host_;
   scoped_ptr<ui::ViewProp> prop_;
 
   // Saved callbacks which inform the caller about the result of the open file/
-  // save file operations.
+  // save file/select operations.
   OpenFileCompletion file_open_completion_callback_;
   OpenMultipleFilesCompletion multi_file_open_completion_callback_;
   SaveFileCompletion file_saveas_completion_callback_;
+  SelectFolderCompletion select_folder_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteRootWindowHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_