Eliminate ash::internal namespace

ash/wm/system_background_controller.h

 // Copyright (c) 2012 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_WM_SYSTEM_BACKGROUND_CONTROLLER_H_
 #define ASH_WM_SYSTEM_BACKGROUND_CONTROLLER_H_
 
 #include <string>
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/window_observer.h"
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
-namespace internal {
 
 // SystemBackgroundController manages a ui::Layer that's stacked at the bottom
 // of an aura::RootWindow's children.  It exists solely to obscure portions of
 // the root layer that aren't covered by any other layers (e.g. before the
 // desktop background image is loaded at startup, or when we scale down all of
 // the other layers as part of a power-button or window-management animation).
 // It should never be transformed or restacked.
 class SystemBackgroundController : public aura::WindowObserver {
  public:
   SystemBackgroundController(aura::Window* root_window, SkColor color);
   virtual ~SystemBackgroundController();
 
   void SetColor(SkColor color);
 
   // aura::WindowObserver overrides:
   virtual void OnWindowBoundsChanged(aura::Window* root,
                                      const gfx::Rect& old_bounds,
                                      const gfx::Rect& new_bounds) OVERRIDE;
 
  private:
   class HostContentLayerDelegate;
 
   aura::Window* root_window_;  // not owned
 
   scoped_ptr<ui::Layer> layer_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemBackgroundController);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_SYSTEM_BACKGROUND_CONTROLLER_H_