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

ash/wm/workspace_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 ASH_WM_WORKSPACE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_CONTROLLER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
@@ skipping 40 matching lines @@
   WorkspaceManager* workspace_manager() {
     return workspace_manager_.get();
   }
 
   // Shows the menu allowing you to configure various aspects of workspaces.
   void ShowMenu(views::Widget* widget, const gfx::Point& location);
 
   // aura::RootWindowObserver overrides:
   virtual void OnRootWindowResized(const gfx::Size& new_size) OVERRIDE;
 
+  // aura::RootWindowObserver overrides:
+  virtual void OnScreenWorkAreaInsetsChanged() OVERRIDE;
+
   // aura::WindowObserver overrides:
   virtual void OnWindowPropertyChanged(aura::Window* window,
                                        const void* key,
                                        intptr_t old) OVERRIDE;
 
   // ui::SimpleMenuModel::Delegate overrides:
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual void ExecuteCommand(int command_id) OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
@@ skipping 20 matching lines @@
   scoped_ptr<views::MenuRunner> menu_runner_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_CONTROLLER_H_