Rename the aura_shell namespace to ash

ash/wm/modality_event_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_WM_MODALITY_EVENT_FILTER_H_
 #define ASH_WM_MODALITY_EVENT_FILTER_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/aura/event_filter.h"
 #include "ash/ash_export.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 class ModalityEventFilterDelegate;
 
 class ASH_EXPORT ModalityEventFilter : public aura::EventFilter {
  public:
   ModalityEventFilter(aura::Window* container,
                       ModalityEventFilterDelegate* delegate);
   virtual ~ModalityEventFilter();
 
   // 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:
   ModalityEventFilterDelegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ModalityEventFilter);
 };
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash
 
 #endif  // ASH_WM_MODALITY_EVENT_FILTER_H_