Remove cast to LocalAudioSource from AudioRtpSender.

talk/app/webrtc/rtpsender.cc

Index: talk/app/webrtc/rtpsender.cc
diff --git a/talk/app/webrtc/rtpsender.cc b/talk/app/webrtc/rtpsender.cc
index c0d23a0503cc08fb5a7fd8b301f8bd99bf076bd8..26fd6b76a8f08a17236c1bfcaabdbc1f14c7f550 100644
--- a/talk/app/webrtc/rtpsender.cc
+++ b/talk/app/webrtc/rtpsender.cc
@@ -184,12 +184,17 @@ void AudioRtpSender::Stop() {
 void AudioRtpSender::SetAudioSend() {
   RTC_DCHECK(!stopped_ && can_send_track());
   cricket::AudioOptions options;
+#if !defined(WEBRTC_CHROMIUM_BUILD)
+  // TODO(tommi): Remove this hack when we move CreateAudioSource out of
+  // PeerConnection.  This is a bit of a strange way to apply local audio
+  // options since it is also applied to all streams/channels, local or remote.
   if (track_->enabled() && track_->GetSource() &&
       !track_->GetSource()->remote()) {
     // TODO(xians): Remove this static_cast since we should be able to connect
     // a remote audio track to a peer connection.
     options = static_cast<LocalAudioSource*>(track_->GetSource())->options();
   }
+#endif
 
   // Use the renderer if the audio track has one, otherwise use the sink
   // adapter owned by this class.