Rename the aura_shell namespace to ash

chrome/browser/ui/views/aura/app_list/app_list_view_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/views/aura/app_list/app_list_view_delegate.h"
 
 #include "chrome/browser/ui/views/aura/app_list/chrome_app_list_item.h"
 
 AppListViewDelegate::AppListViewDelegate() {
 }
 
 AppListViewDelegate::~AppListViewDelegate() {
 }
 
 void AppListViewDelegate::OnAppListItemActivated(
-    aura_shell::AppListItemModel* item,
+    ash::AppListItemModel* item,
     int event_flags) {
   static_cast<ChromeAppListItem*>(item)->Activate(event_flags);
 }