Rename the aura_shell namespace to ash

ash/wm/shadow_controller.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 ASH_WM_SHADOW_CONTROLLER_H_
 #define ASH_WM_SHADOW_CONTROLLER_H_
 #pragma once
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "ui/aura/root_window_observer.h"
 #include "ui/aura/window_observer.h"
 #include "ash/ash_export.h"
 
 namespace aura {
 class Window;
 }
 namespace gfx {
 class Rect;
 }
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 class Shadow;
 
 // ShadowController observes changes to windows and creates and updates drop
 // shadows as needed.
 class ASH_EXPORT ShadowController : public aura::RootWindowObserver,
                                            public aura::WindowObserver {
 public:
   class TestApi {
@@ skipping 40 matching lines @@
 
   // Creates a new shadow for |window| and stores it in |window_shadows_|.  The
   // shadow's bounds are initialized and it is added to the window's layer.
   void CreateShadowForWindow(aura::Window* window);
 
   WindowShadowMap window_shadows_;
 
   DISALLOW_COPY_AND_ASSIGN(ShadowController);
 };
 
-}  // namepsace aura_shell
 }  // namepsace internal
+}  // namepsace ash
 
 #endif  // ASH_WM_SHADOW_CONTROLLER_H_