Remove #pragma once from ash

ash/wm/panel_frame_view.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_WM_PANEL_FRAME_VIEW_H_
 #define ASH_WM_PANEL_FRAME_VIEW_H_
-#pragma once
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
 #include "ui/views/window/non_client_view.h"
 #include "ui/views/controls/button/button.h"  // ButtonListener
 
 namespace views {
 class ImageButton;
 }
@@ skipping 33 matching lines @@
   views::ImageButton* close_button_;
   views::ImageButton* minimize_button_;
   gfx::Rect client_view_bounds_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelFrameView);
 };
 
 }
 
 #endif // ASH_WM_PANEL_FRAME_VIEW_H_