Implements the GetSignalLevel and GetStats interface for the local audio track.

content/renderer/media/webrtc_local_audio_track.h

Index: content/renderer/media/webrtc_local_audio_track.h
diff --git a/content/renderer/media/webrtc_local_audio_track.h b/content/renderer/media/webrtc_local_audio_track.h
index 70ae7bbccb3dc15f82d6a277971ef0205581ed4f..c64709a420caed173095ffd3877d09860c49b591 100644
--- a/content/renderer/media/webrtc_local_audio_track.h
+++ b/content/renderer/media/webrtc_local_audio_track.h
@@ -18,6 +18,7 @@
 
 namespace content {
 
+class MediaStreamAudioProcessor;
 class MediaStreamAudioSink;
 class MediaStreamAudioSinkOwner;
 class MediaStreamAudioTrackSink;
@@ -64,7 +65,7 @@ class CONTENT_EXPORT WebRtcLocalAudioTrack
   void Stop();
 
   // Method called by the capturer to deliver the capture data.
-  // Call on the capture audio thread.
+  // Called on the capture audio thread.
   void Capture(const int16* audio_data,
                base::TimeDelta delay,
                int volume,
@@ -73,9 +74,15 @@ class CONTENT_EXPORT WebRtcLocalAudioTrack
 
   // Method called by the capturer to set the audio parameters used by source
   // of the capture data..
-  // Call on the capture audio thread.
+  // Called on the capture audio thread.
   void OnSetFormat(const media::AudioParameters& params);
 
+  // Method called by the capturer to set the processor that applies signal
+  // processing on the data of the track.
+  // Called on the capture audio thread.
+  void SetAudioProcessor(
+      const scoped_refptr<MediaStreamAudioProcessor>& processor);
+
   blink::WebAudioSourceProvider* audio_source_provider() const {
     return source_provider_.get();
   }