Remove #pragma once from content

content/renderer/media/render_media_log.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_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_
 #define CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_
-#pragma once
 
 #include "media/base/media_log.h"
 
 namespace base {
 class MessageLoopProxy;
 }
 
 // RenderMediaLog is an implementation of MediaLog that passes all events to the
 // browser process.
 class RenderMediaLog : public media::MediaLog {
  public:
   RenderMediaLog();
 
   // MediaLog implementation.
   virtual void AddEvent(scoped_ptr<media::MediaLogEvent> event) OVERRIDE;
 
  private:
   virtual ~RenderMediaLog();
 
   scoped_refptr<base::MessageLoopProxy> render_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderMediaLog);
 };
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDER_MEDIA_LOG_H_