Calculate the signal level on the media stream local audio track

content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h

Index: content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h
diff --git a/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h b/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h
index 2aecb6cc801f5c13f0da2ea3822c1724a5512fc3..555e40de9f67bcc02db14702f4f1e9ef3e29a64c 100644
--- a/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h
+++ b/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h
@@ -44,6 +44,8 @@ class CONTENT_EXPORT WebRtcLocalAudioTrackAdapter
 
   std::vector<int> VoeChannels() const;
 
+  void SetSignalLevel(int signal_level);
+
  private:
   // webrtc::MediaStreamTrack implementation.
   virtual std::string kind() const OVERRIDE;
@@ -66,7 +68,10 @@ class CONTENT_EXPORT WebRtcLocalAudioTrackAdapter
   // A vector of WebRtc VoE channels that the capturer sends data to.
   std::vector<int> voe_channels_;
 
-  // Protects |voe_channels_|.
+  // The amplitude of the signal.
+  int signal_level_;

[tommi (sloooow) - chröme, 2014/02/27 08:39:43]

As is, this variable is never used.  Can we skip adding it in this cl?

[no longer working on chromium, 2014/02/28 08:16:25]

Done.

+
+  // Protects |voe_channels_|, |signal_level_|.
   mutable base::Lock lock_;
 };