Eliminate ash::internal namespace

ash/system/tray_update.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_SYSTEM_TRAY_UPDATE_H_
 #define ASH_SYSTEM_TRAY_UPDATE_H_
 
 #include "ash/system/tray/tray_image_item.h"
 #include "ash/system/user/update_observer.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace views {
 class View;
 }
 
 namespace ash {
-namespace internal {
 
 namespace tray {
 class UpdateNagger;
 }
 
 class TrayUpdate : public TrayImageItem,
                    public UpdateObserver {
  public:
   explicit TrayUpdate(SystemTray* system_tray);
   virtual ~TrayUpdate();
@@ skipping 10 matching lines @@
 
   // Used to nag the user in case the tray has been hidden too long with an
   // unseen update notification.
   scoped_ptr<tray::UpdateNagger> nagger_;
 
   UpdateObserver::UpdateSeverity severity_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayUpdate);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_UPDATE_H_