Rename the aura_shell namespace to ash

ash/wm/stacking_controller.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 "ash/wm/stacking_controller.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/always_on_top_controller.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 namespace {
 
 aura::Window* GetContainer(int id) {
   return Shell::GetInstance()->GetContainer(id);
 }
 
 bool IsWindowModal(aura::Window* window) {
   return window->transient_parent() &&
       window->GetIntProperty(aura::client::kModalKey);
@@ skipping 59 matching lines @@
   aura::Window* container = NULL;
   if (window_container_id < lock_container_id)
     container = GetContainer(internal::kShellWindowId_ModalContainer);
   else
     container = GetContainer(internal::kShellWindowId_LockModalContainer);
 
   return container;
 }
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash