Revert 255158 "Avoid hitting the thread check when WebRtcAudioRe..."

trunk/src/content/renderer/media/webrtc_audio_device_impl.cc

Index: trunk/src/content/renderer/media/webrtc_audio_device_impl.cc
===================================================================
--- trunk/src/content/renderer/media/webrtc_audio_device_impl.cc	(revision 256663)
+++ trunk/src/content/renderer/media/webrtc_audio_device_impl.cc	(working copy)
@@ -177,12 +177,6 @@
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_EQ(renderer, renderer_);
   base::AutoLock auto_lock(lock_);
-  // Notify the playout sink of the change.
-  for (PlayoutDataSinkList::const_iterator it = playout_sinks_.begin();
-       it != playout_sinks_.end(); ++it) {
-    (*it)->OnPlayoutDataSourceChanged();
-  }
-
   renderer_ = NULL;
   playing_ = false;
 }