Remove #pragma once from content

content/plugin/webplugin_accelerated_surface_proxy_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_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
 #define CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/gl/gpu_preference.h"
 #include "webkit/plugins/npapi/webplugin_accelerated_surface_mac.h"
 
 class WebPluginProxy;
 class AcceleratedSurface;
 
 // Out-of-process implementation of WebPluginAcceleratedSurface that proxies
 // calls through a WebPluginProxy.
@@ skipping 24 matching lines @@
 
   WebPluginProxy* plugin_proxy_;  // Weak ref.
   gfx::PluginWindowHandle window_handle_;
   AcceleratedSurface* surface_;
   bool composited_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginAcceleratedSurfaceProxy);
 };
 
 #endif  // CONTENT_PLUGIN_WEBPLUGIN_ACCELERATED_SURFACE_PROXY_H_