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

content/renderer/media/media_stream_audio_sink_owner.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_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_
 
 #include <vector>
 
 #include "base/synchronization/lock.h"
 #include "content/renderer/media/media_stream_audio_track_sink.h"
 
 namespace content {
 
 class MediaStreamAudioSink;
 
 // Reference counted holder of MediaStreamAudioSink sinks.
 class MediaStreamAudioSinkOwner : public MediaStreamAudioTrackSink {
  public:
   explicit MediaStreamAudioSinkOwner(MediaStreamAudioSink* sink);
 
   // MediaStreamAudioTrackSink implementation.
-  virtual int OnData(const int16* audio_data,
-                     int sample_rate,
-                     int number_of_channels,
-                     int number_of_frames,
-                     const std::vector<int>& channels,
-                     int audio_delay_milliseconds,
-                     int current_volume,
-                     bool need_audio_processing,
-                     bool key_pressed) override;
-  virtual void OnSetFormat(const media::AudioParameters& params) override;
-  virtual void OnReadyStateChanged(
+  int OnData(const int16* audio_data,
+             int sample_rate,
+             int number_of_channels,
+             int number_of_frames,
+             const std::vector<int>& channels,
+             int audio_delay_milliseconds,
+             int current_volume,
+             bool need_audio_processing,
+             bool key_pressed) override;
+  void OnSetFormat(const media::AudioParameters& params) override;
+  void OnReadyStateChanged(
       blink::WebMediaStreamSource::ReadyState state) override;
-  virtual void Reset() override;
-  virtual bool IsEqual(const MediaStreamAudioSink* other) const override;
-  virtual bool IsEqual(const PeerConnectionAudioSink* other) const override;
+  void Reset() override;
+  bool IsEqual(const MediaStreamAudioSink* other) const override;
+  bool IsEqual(const PeerConnectionAudioSink* other) const override;
 
  protected:
-  virtual ~MediaStreamAudioSinkOwner() {}
+  ~MediaStreamAudioSinkOwner() override {}
 
  private:
   mutable base::Lock lock_;
 
   // Raw pointer to the delegate, the client need to call Reset() to set the
   // pointer to NULL before the delegate goes away.
   MediaStreamAudioSink* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioSinkOwner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SINK_OWNER_H_