Calculate the signal level on the media stream local audio track

content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc

Index: content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc
diff --git a/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc b/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc
index 4d1b33e4ac4c49dbdc354bf5e2471ba8d53eac9b..c03c90f6f4bf086aa273dceaa1ff7ce960d1de08 100644
--- a/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc
+++ b/content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc
@@ -26,7 +26,8 @@ WebRtcLocalAudioTrackAdapter::WebRtcLocalAudioTrackAdapter(
     webrtc::AudioSourceInterface* track_source)
     : webrtc::MediaStreamTrack<webrtc::AudioTrackInterface>(label),
       owner_(NULL),
-      track_source_(track_source) {
+      track_source_(track_source),
+      signal_level_(0) {
 }
 
 WebRtcLocalAudioTrackAdapter::~WebRtcLocalAudioTrackAdapter() {
@@ -47,6 +48,11 @@ std::vector<int> WebRtcLocalAudioTrackAdapter::VoeChannels() const {
   return voe_channels_;
 }
 
+void WebRtcLocalAudioTrackAdapter::SetSignalLevel(int signal_level) {

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

document on which thread this is called?

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

Done with adding a comment in the header file.

+  base::AutoLock auto_lock(lock_);
+  signal_level_ = signal_level;
+}
+
 void WebRtcLocalAudioTrackAdapter::AddChannel(int channel_id) {
   DVLOG(1) << "WebRtcLocalAudioTrack::AddChannel(channel_id="
            << channel_id << ")";