Move some more files into ash... this time seed the window manager dir.

ash/wm/stacking_controller.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 UI_AURA_SHELL_STACKING_CONTROLLER_H_
-#define UI_AURA_SHELL_STACKING_CONTROLLER_H_
+#ifndef ASH_WM_STACKING_CONTROLLER_H_
+#define ASH_WM_STACKING_CONTROLLER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/client/stacking_client.h"
 
 namespace aura_shell {
 namespace internal {
 
@@ skipping 16 matching lines @@
   aura::Window* GetModalContainer(aura::Window* window) const;
 
   scoped_ptr<internal::AlwaysOnTopController> always_on_top_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(StackingController);
 };
 
 }  // namespace internal
 }  // namespace aura_shell
 
-#endif  // UI_AURA_SHELL_STACKING_CONTROLLER_H_
+#endif  // ASH_WM_STACKING_CONTROLLER_H_