Remove #pragma once from ash

ash/launcher/tabbed_launcher_button.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_LAUNCHER_TABBED_LAUNCHER_BUTTON_H_
 #define ASH_LAUNCHER_TABBED_LAUNCHER_BUTTON_H_
-#pragma once
 
 #include "ash/launcher/launcher_button.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/glow_hover_controller.h"
 
 namespace ui {
 class MultiAnimation;
@@ skipping 80 matching lines @@
   // drawn. It does not necessarily indicate if the window is 'incognito'.
   const IncognitoState is_incognito_;
 
   DISALLOW_COPY_AND_ASSIGN(TabbedLauncherButton);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_TABBED_LAUNCHER_BUTTON_H_