Refactor menu controller to isolate aura dependency.

ui/views/controls/menu/menu_controller.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_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
 
 #include "build/build_config.h"
 
 #include <list>
@@ skipping 17 matching lines @@
 }
 namespace ui {
 class NativeTheme;
 class OSExchangeData;
 class ScopedEventDispatcher;
 }
 namespace views {
 
 class MenuButton;
 class MenuHostRootView;
+class MenuMessageLoop;
 class MouseEvent;
 class SubmenuView;
 class View;
 
 namespace internal {
 class MenuControllerDelegate;
 class MenuEventDispatcher;
 class MenuMessagePumpDispatcher;
 class MenuRunnerImpl;
 }
@@ skipping 537 matching lines @@
   // screen coordinates). Otherwise this will be (0, 0).
   gfx::Point menu_start_mouse_press_loc_;
 
   // Controls behavior differences between a combobox and other types of menu
   // (like a context menu).
   bool is_combobox_;
 
   // Set to true if the menu item was selected by touch.
   bool item_selected_by_touch_;
 
-  scoped_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
+  scoped_ptr<MenuMessageLoop> message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuController);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_