Set audio format before adding pepper sink to audio track.

content/renderer/media/webrtc_local_audio_track.cc

Index: content/renderer/media/webrtc_local_audio_track.cc
diff --git a/content/renderer/media/webrtc_local_audio_track.cc b/content/renderer/media/webrtc_local_audio_track.cc
index 13aee2d50cd9af4b08edd0ebe9248d791b7ec879..63bdc39e7db5fffb6a39ad1af39e700f3194c416 100644
--- a/content/renderer/media/webrtc_local_audio_track.cc
+++ b/content/renderer/media/webrtc_local_audio_track.cc
@@ -40,6 +40,15 @@ WebRtcLocalAudioTrack::~WebRtcLocalAudioTrack() {
   Stop();
 }
 
+const media::AudioParameters WebRtcLocalAudioTrack::GetOutputFormat() const {
+  DCHECK(main_render_thread_checker_.CalledOnValidThread());
+  if (webaudio_source_.get()) {

[DaleCurtis, 2015/01/27 19:50:09]

Is .get() necessary? I prefer ternary for this, but up to you :)

[Anand Mistry (off Chromium), 2015/01/27 23:14:50]

.get() appears to be the convention in this file, so I've stuck with it.

+    return media::AudioParameters();
+  } else {
+    return capturer_->GetOutputFormat();
+  }
+}
+
 void WebRtcLocalAudioTrack::Capture(const media::AudioBus& audio_bus,
                                     base::TimeTicks estimated_capture_time,
                                     bool force_report_nonzero_energy) {