Eliminate ash::internal namespace

ash/shelf/shelf_button.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_SHELF_SHELF_BUTTON_H_
 #define ASH_SHELF_SHELF_BUTTON_H_
 
 #include "ash/ash_export.h"
 #include "ui/gfx/shadow_value.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/image_view.h"
 
 namespace ash {
-namespace internal {
-
 class ShelfButtonHost;
 class ShelfLayoutManager;
 
 // Button used for items on the launcher, except for the AppList.
 class ASH_EXPORT ShelfButton : public views::CustomButton {
  public:
   // Used to indicate the current state of the button.
   enum State {
     // Nothing special. Usually represents an app shortcut item with no running
     // instance.
@@ skipping 121 matching lines @@
 
   gfx::ShadowValues icon_shadows_;
 
   // If non-null the destuctor sets this to true. This is set while the menu is
   // showing and used to detect if the menu was deleted while running.
   bool* destroyed_flag_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfButton);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_BUTTON_H_