Standardize usage of virtual/override/final in content/renderer/

content/renderer/media/rtc_video_decoder_factory.h

 // Copyright 2013 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_RTC_VIDEO_DECODER_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_H_
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "third_party/libjingle/source/talk/media/webrtc/webrtcvideodecoderfactory.h"
 #include "third_party/webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
 
 namespace webrtc {
 class VideoDecoder;
 }  // namespace webrtc
 
 namespace media {
 class GpuVideoAcceleratorFactories;
 }  // namespace media
 
 namespace content {
 
 // TODO(wuchengli): add unittest.
 class CONTENT_EXPORT RTCVideoDecoderFactory
     : NON_EXPORTED_BASE(public cricket::WebRtcVideoDecoderFactory) {
  public:
   explicit RTCVideoDecoderFactory(
       const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories);
-  virtual ~RTCVideoDecoderFactory();
+  ~RTCVideoDecoderFactory() override;
 
   // Runs on Chrome_libJingle_WorkerThread. The child thread is blocked while
   // this runs.
-  virtual webrtc::VideoDecoder* CreateVideoDecoder(webrtc::VideoCodecType type)
-      override;
+  webrtc::VideoDecoder* CreateVideoDecoder(
+      webrtc::VideoCodecType type) override;
 
   // Runs on Chrome_libJingle_WorkerThread. The child thread is blocked while
   // this runs.
-  virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) override;
+  void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) override;
 
  private:
   scoped_refptr<media::GpuVideoAcceleratorFactories> gpu_factories_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoderFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_H_