Remove #pragma once from content

content/browser/renderer_host/accelerated_surface_container_mac.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 CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_
-#pragma once
 
 // The "GPU plugin" is currently implemented as a special kind of
 // NPAPI plugin to provide high-performance on-screen 3D rendering for
 // Pepper 3D.
 //
 // On Windows and X11 platforms the GPU plugin relies on cross-process
 // parenting of windows, which is not supported via any public APIs in
 // the Mac OS X window system.
 //
 // To achieve full hardware acceleration we use the new IOSurface APIs
@@ skipping 130 matching lines @@
   bool visible_;
 
   // Stores if the plugin's IOSurface has been swapped before. Used to not show
   // it before it hasn't been painted to at least once.
   bool was_painted_to_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerMac);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_