Fix the full screen switching browser window dipping below launcher bar issue.

ui/aura/root_window.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_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 107 matching lines @@
   bool DispatchTouchEvent(TouchEvent* event);
 
   // Handles a gesture event. Returns true if handled. Unlike the other
   // event-dispatching function (e.g. for touch/mouse/keyboard events), gesture
   // events are dispatched from GestureRecognizer instead of RootWindowHost.
   bool DispatchGestureEvent(GestureEvent* event);
 
   // Called when the host changes size.
   void OnHostResized(const gfx::Size& size);
 
+  // Called after the screen's work_area_insets_ changed.
+  void OnScreenWorkAreaInsetsChanged();
+
   // Called when the native screen's resolution changes.
   void OnNativeScreenResized(const gfx::Size& size);
 
   // Invoked when |window| is being destroyed.
   void OnWindowDestroying(Window* window);
 
   // Invokved when |window|'s bounds is changed. |contained_mouse| indicates if
   // the bounds before change contained the |last_moust_location()|.
   void OnWindowBoundsChanged(Window* window, bool contained_mouse);
 
@@ skipping 172 matching lines @@
   bool synthesize_mouse_move_;
   bool waiting_on_compositing_end_;
   bool draw_on_compositing_end_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_