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

content/renderer/media/webrtc_local_audio_source_provider.h

Index: content/renderer/media/webrtc_local_audio_source_provider.h
diff --git a/content/renderer/media/webrtc_local_audio_source_provider.h b/content/renderer/media/webrtc_local_audio_source_provider.h
index e813cbeb7b79aaf826208d61b0c69328ecf350e7..24e873ced11234cbd0d095fa634242da0211b4e0 100644
--- a/content/renderer/media/webrtc_local_audio_source_provider.h
+++ b/content/renderer/media/webrtc_local_audio_source_provider.h
@@ -53,12 +53,12 @@ class CONTENT_EXPORT WebRtcLocalAudioSourceProvider
   virtual ~WebRtcLocalAudioSourceProvider();
 
   // 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;
-  virtual void OnReadyStateChanged(
+  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;
+  void OnReadyStateChanged(
       blink::WebMediaStreamSource::ReadyState state) override;
 
   // blink::WebAudioSourceProvider implementation.
@@ -69,8 +69,8 @@ class CONTENT_EXPORT WebRtcLocalAudioSourceProvider
   // media::AudioConverter::Inputcallback implementation.
   // This function is triggered by provideInput()on the WebAudio audio thread,
   // so it has been under the protection of |lock_|.
-  virtual double ProvideInput(media::AudioBus* audio_bus,
-                              base::TimeDelta buffer_delay) override;
+  double ProvideInput(media::AudioBus* audio_bus,
+                      base::TimeDelta buffer_delay) override;
 
   // Method to allow the unittests to inject its own sink parameters to avoid
   // query the hardware.