Eliminate ash::internal namespace

ash/system/tray/throbber_view.h

 // Copyright (c) 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_SYSTEM_TRAY_THROBBER_VIEW_H_
 #define ASH_SYSTEM_TRAY_THROBBER_VIEW_H_
 
 #include "ui/gfx/size.h"
 #include "ui/views/controls/throbber.h"
 #include "ui/views/view.h"
 
 namespace ash {
-namespace internal {
 
 // A SmoothedThrobber with tooltip.
 class SystemTrayThrobber : public views::SmoothedThrobber {
  public:
   SystemTrayThrobber(int frame_delay_ms);
   virtual ~SystemTrayThrobber();
 
   void SetTooltipText(const base::string16& tooltip_text);
 
   // Overriden from views::View.
@@ skipping 28 matching lines @@
   void ScheduleAnimation(bool start_throbber);
 
   SystemTrayThrobber* throbber_;
 
   // The current tooltip text.
   base::string16 tooltip_text_;
 
   DISALLOW_COPY_AND_ASSIGN(ThrobberView);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_THROBBER_VIEW_H_