Rename the aura_shell namespace to ash

ash/app_list/app_list.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_APP_LIST_APP_LIST_H_
 #define ASH_APP_LIST_APP_LIST_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/event_filter.h"
 #include "ui/gfx/compositor/layer_animation_observer.h"
 #include "ui/views/widget/widget.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 // AppList is a controller that manages app list UI for shell. To show the UI,
 // it requests app list widget from ShellDelegate and shows it when ready.
 // While the UI is visible, it monitors things such as app list widget's
 // activation state and desktop mouse click to auto dismiss the UI.
 class AppList : public aura::EventFilter,
                 public ui::LayerAnimationObserver,
                 public views::Widget::Observer {
  public:
@@ skipping 44 matching lines @@
   // App list widget we get from ShellDelegate.
   views::Widget* widget_;
 
   // A weak ptr factory for callbacks that ShellDelegate used to set widget.
   base::WeakPtrFactory<AppList> set_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppList);
 };
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash
 
 #endif  //  ASH_APP_LIST_APP_LIST_H_