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

content/renderer/media/webrtc/webrtc_audio_sink_adapter.h

 // Copyright 2014 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_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/renderer/media_stream_audio_sink.h"
 
 namespace webrtc {
 class AudioTrackSinkInterface;
 }  // namespace webrtc
 
 namespace content {
 
 // Adapter to the webrtc::AudioTrackSinkInterface of the audio track.
 // This class is used in between the MediaStreamAudioSink and
 // webrtc::AudioTrackSinkInterface. It gets data callback via the
 // MediaStreamAudioSink::OnData() interface and pass the data to
 // webrtc::AudioTrackSinkInterface.
 class WebRtcAudioSinkAdapter : public MediaStreamAudioSink {
  public:
   explicit WebRtcAudioSinkAdapter(
       webrtc::AudioTrackSinkInterface* sink);
-  virtual ~WebRtcAudioSinkAdapter();
+  ~WebRtcAudioSinkAdapter() override;
 
   bool IsEqual(const webrtc::AudioTrackSinkInterface* other) const;
 
  private:
   // MediaStreamAudioSink implementation.
-  virtual void OnData(const int16* audio_data,
-                      int sample_rate,
-                      int number_of_channels,
-                      int number_of_frames) override;
-  virtual void OnSetFormat(const media::AudioParameters& params) override;
+  void OnData(const int16* audio_data,
+              int sample_rate,
+              int number_of_channels,
+              int number_of_frames) override;
+  void OnSetFormat(const media::AudioParameters& params) override;
 
   webrtc::AudioTrackSinkInterface* const sink_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcAudioSinkAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_AUDIO_SINK_ADAPTER_H_