Refactor menu controller to isolate aura dependency.

ui/views/widget/widget.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_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <set>
 #include <stack>
 #include <vector>
@@ skipping 478 matching lines @@
 
   // Accessors for fullscreen state.
   void SetFullscreen(bool fullscreen);
   bool IsFullscreen() const;
 
   // Sets the opacity of the widget. This may allow widgets behind the widget
   // in the Z-order to become visible, depending on the capabilities of the
   // underlying windowing system.
   void SetOpacity(unsigned char opacity);
 
+  // Sets whether a shadow should be drawn around the window.
+  void SetHasShadow(bool has_shadow);

[tapted, 2014/05/06 00:02:46]

Maybe call this `SetHasActivationShadow`?  And borrow some words from the
comment in shadow_controller.h

[Andre, 2014/05/07 23:12:39]

Done.

+
   // Sets whether or not the window should show its frame as a "transient drag
   // frame" - slightly transparent and without the standard window controls.
   void SetUseDragFrame(bool use_drag_frame);
 
   // Flashes the frame of the window to draw attention to it. Currently only
   // implemented on Windows for non-Aura.
   void FlashFrame(bool flash);
 
   // Returns the View at the root of the View hierarchy contained by this
   // Widget.
@@ skipping 404 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_