Rename the aura_shell namespace to ash

ash/shell/widgets.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/toplevel_frame_view.h"
 #include "base/utf_string_conversions.h"  // ASCIIToUTF16
 #include "ui/aura/window.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/controls/button/radio_button.h"
@@ skipping 105 matching lines @@
 
 views::View* WidgetsWindow::GetContentsView() {
   return this;
 }
 
 string16 WidgetsWindow::GetWindowTitle() const {
   return ASCIIToUTF16("Examples: Widgets");
 }
 
 views::NonClientFrameView* WidgetsWindow::CreateNonClientFrameView() {
-  return new aura_shell::internal::ToplevelFrameView;
+  return new ash::internal::ToplevelFrameView;
 }
 
 }  // namespace
 
 namespace ash {
 namespace shell {
 
 void CreateWidgetsWindow() {
   gfx::Rect bounds(kWindowLeft, kWindowTop, kWindowWidth, kWindowHeight);
   views::Widget* widget =
       views::Widget::CreateWindowWithBounds(new WidgetsWindow, bounds);
   widget->GetNativeView()->SetName("WidgetsWindow");
   widget->Show();
 }
 
 }  // namespace shell
 }  // namespace ash