Rename the aura_shell namespace to ash

ash/accelerators/accelerator_filter.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_ACCELERATORS_ACCELERATOR_FILTER_H_
 #define ASH_ACCELERATORS_ACCELERATOR_FILTER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/event_filter.h"
 #include "ash/ash_export.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 // AcceleratorFilter filters key events for AcceleratorControler handling global
 // keyboard accelerators.
 class ASH_EXPORT AcceleratorFilter : public aura::EventFilter {
  public:
   AcceleratorFilter();
   virtual ~AcceleratorFilter();
 
   // Overridden from aura::EventFilter:
   virtual bool PreHandleKeyEvent(aura::Window* target,
                                  aura::KeyEvent* event) OVERRIDE;
   virtual bool PreHandleMouseEvent(aura::Window* target,
                                    aura::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
                                               aura::TouchEvent* event) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AcceleratorFilter);
 };
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_FILTER_H_