Ensure that menus put in Chrome ASH on Windows 8 are operatable using the keyboard.

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 148 matching lines @@
   virtual bool CopyAreaToSkCanvas(const gfx::Rect& source_bounds,
                                   const gfx::Point& dest_offset,
                                   SkCanvas* canvas) OVERRIDE;
   virtual bool GrabSnapshot(
       const gfx::Rect& snapshot_bounds,
       std::vector<unsigned char>* png_representation) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void PrepareForShutdown() OVERRIDE;
 
+  // Helper function to dispatch a keyboard message to the desired target.
+  // The default target is the RootWindowHostDelegate. For nested message loop
+  // invocations we post a synthetic keyboard message directly into the message
+  // loop. The dispatcher for the nested loop would then decide how this
+  // message is routed.
+  void DispatchKeyboardMessage(ui::EventType type,
+                               uint32 vkey,
+                               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.
   OpenFileCompletion file_open_completion_callback_;
   OpenMultipleFilesCompletion multi_file_open_completion_callback_;
   SaveFileCompletion file_saveas_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteRootWindowHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_REMOTE_ROOT_WINDOW_HOST_WIN_H_