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

win8/metro_driver/chrome_app_view_ash.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 WIN8_METRO_DRIVER_CHROME_APP_VIEW_ASH_H_
 #define WIN8_METRO_DRIVER_CHROME_APP_VIEW_ASH_H_
 
 #include <windows.applicationmodel.core.h>
 #include <windows.ui.core.h>
 #include <windows.ui.input.h>
 #include <windows.ui.viewmanagement.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "ui/base/events/event_constants.h"
 #include "win8/metro_driver/direct3d_helper.h"
 
 namespace IPC {
   class Listener;
   class ChannelProxy;
 }
 
 class OpenFilePickerSession;
 class SaveFilePickerSession;
+class FolderPickerSession;
+class FilePickerSessionBase;
 
 struct MetroViewerHostMsg_SaveAsDialogParams;
 
 class ChromeAppViewAsh
     : public mswr::RuntimeClass<winapp::Core::IFrameworkView> {
  public:
   ChromeAppViewAsh();
   ~ChromeAppViewAsh();
 
   // IViewProvider overrides.
   IFACEMETHOD(Initialize)(winapp::Core::ICoreApplicationView* view);
   IFACEMETHOD(SetWindow)(winui::Core::ICoreWindow* window);
   IFACEMETHOD(Load)(HSTRING entryPoint);
   IFACEMETHOD(Run)();
   IFACEMETHOD(Uninitialize)();
 
   // Helper function to unsnap the chrome metro app if it is snapped.
   // Returns S_OK on success.
   static HRESULT Unsnap();
 
   void OnSetCursor(HCURSOR cursor);
   void OnDisplayFileOpenDialog(const string16& title,
                                const string16& filter,
                                const string16& 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
   // instance which is deleted after we read the required information from
   // the OpenFilePickerSession class.
   void OnOpenFileCompleted(OpenFilePickerSession* open_file_picker,
                            bool success);
 
   // This function is invoked when the save file operation completes. The
   // result of the operation is passed in along with the SaveFilePickerSession
   // instance which is deleted after we read the required information from
   // the SaveFilePickerSession class.
   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);
 
   HRESULT OnPointerMoved(winui::Core::ICoreWindow* sender,
                          winui::Core::IPointerEventArgs* args);
 
   HRESULT OnPointerPressed(winui::Core::ICoreWindow* sender,
                            winui::Core::IPointerEventArgs* args);
 
@@ skipping 25 matching lines @@
   EventRegistrationToken pointermoved_token_;
   EventRegistrationToken pointerpressed_token_;
   EventRegistrationToken pointerreleased_token_;
   EventRegistrationToken wheel_token_;
   EventRegistrationToken keydown_token_;
   EventRegistrationToken keyup_token_;
   EventRegistrationToken character_received_token_;
   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.
   ui::EventFlags mouse_down_flags_;
 
   // Set the D3D swap chain and nothing else.
   metro_driver::Direct3DHelper direct3d_helper_;
 
   // The channel to Chrome, in particular to the MetroViewerProcessHost.
   IPC::ChannelProxy* ui_channel_;
 
   // The actual window behind the view surface.
   HWND core_window_hwnd_;
 };
 
 #endif  // WIN8_METRO_DRIVER_CHROME_APP_VIEW_ASH_H_