Eliminate ash::internal namespace

ash/wm/screen_dimmer.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_SCREEN_DIMMER_H_
 #define ASH_WM_SCREEN_DIMMER_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_observer.h"
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
-namespace internal {
 
 // ScreenDimmer displays a partially-opaque layer above everything
 // else in the root window to darken the display.  It shouldn't be used
 // for long-term brightness adjustments due to performance
 // considerations -- it's only intended for cases where we want to
 // briefly dim the screen (e.g. to indicate to the user that we're
 // about to suspend a machine that lacks an internal backlight that
 // can be adjusted).
 class ASH_EXPORT ScreenDimmer : public aura::WindowObserver {
  public:
@@ skipping 28 matching lines @@
   // Partially-opaque layer that's stacked above all of the root window's
   // children and used to dim the screen.  NULL until the first time we dim.
   scoped_ptr<ui::Layer> dimming_layer_;
 
   // Are we currently dimming the screen?
   bool currently_dimming_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenDimmer);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_SCREEN_DIMMER_H_