Move views::Accelerator to ui in order to use it from aura code.

views/controls/menu/menu.h

 // Copyright (c) 2011 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 VIEWS_CONTROLS_MENU_MENU_H_
 #define VIEWS_CONTROLS_MENU_MENU_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "ui/gfx/native_widget_types.h"
 #include "views/views_export.h"
 
 class SkBitmap;
 
 namespace gfx {
 class Point;
 }
 
+namespace ui {
+class Accelerator;
+}
+
 namespace views {
 
-class Accelerator;
-
 class VIEWS_EXPORT Menu {
  public:
   /////////////////////////////////////////////////////////////////////////////
   //
   // Delegate Interface
   //
   //  Classes implement this interface to tell the menu system more about each
   //  item as it is created.
   //
   /////////////////////////////////////////////////////////////////////////////
@@ skipping 13 matching lines @@
     }
 
     // The string shown for the menu item.
     virtual string16 GetLabel(int id) const {
       return string16();
     }
 
     // The delegate needs to implement this function if it wants to display
     // the shortcut text next to each menu item. If there is an accelerator
     // for a given item id, the implementor must return it.
-    virtual bool GetAcceleratorInfo(int id, views::Accelerator* accel) {
+    virtual bool GetAcceleratorInfo(int id, ui::Accelerator* accel) {
       return false;
     }
 
     // The icon shown for the menu item.
     virtual const SkBitmap& GetIcon(int id) const {
       return GetEmptyIcon();
     }
 
     // The number of items to show in the menu
     virtual int GetItemCount() const {
@@ skipping 196 matching lines @@
 
   // How this popup menu should be aligned relative to the point it is run at.
   AnchorPoint anchor_;
 
   DISALLOW_COPY_AND_ASSIGN(Menu);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_H_