Eliminate ash::internal namespace

ash/display/display_change_observer_chromeos.h

 // Copyright 2013 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_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
 #define ASH_DISPLAY_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "base/basictypes.h"
 #include "ui/display/chromeos/output_configurator.h"
 
 namespace ash {
-namespace internal {
 
 struct DisplayMode;
 
 // An object that observes changes in display configuration and
 // update DisplayManagers.
 class DisplayChangeObserver : public ui::OutputConfigurator::StateController,
                               public ui::OutputConfigurator::Observer,
                               public ShellObserver {
  public:
   // Returns the resolution list.
@@ skipping 13 matching lines @@
   virtual void OnDisplayModeChanged(
       const ui::OutputConfigurator::DisplayStateList& outputs) OVERRIDE;
 
   // Overriden from ShellObserver:
   virtual void OnAppTerminating() OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserver);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_AURA_DISPLAY_CHANGE_OBSERVER_CHROMEOS_H