Prevent a voice channel from sending data before a renderer is set.

webrtc/api/webrtcsession.cc

Index: webrtc/api/webrtcsession.cc
diff --git a/webrtc/api/webrtcsession.cc b/webrtc/api/webrtcsession.cc
index 9b37811368ffb37024ebb82d5dc5714803e58542..0ce6431737724942436a5b3ffc2b5b13e185d41b 100644
--- a/webrtc/api/webrtcsession.cc
+++ b/webrtc/api/webrtcsession.cc
@@ -1214,13 +1214,13 @@ void WebRtcSession::SetAudioPlayout(uint32_t ssrc, bool enable) {
 void WebRtcSession::SetAudioSend(uint32_t ssrc,
                                  bool enable,
                                  const cricket::AudioOptions& options,
-                                 cricket::AudioRenderer* renderer) {
+                                 cricket::AudioSource* source) {
   ASSERT(signaling_thread()->IsCurrent());
   if (!voice_channel_) {
     LOG(LS_ERROR) << "SetAudioSend: No audio channel exists.";
     return;
   }
-  if (!voice_channel_->SetAudioSend(ssrc, enable, &options, renderer)) {
+  if (!voice_channel_->SetAudioSend(ssrc, enable, &options, source)) {
     LOG(LS_ERROR) << "SetAudioSend: ssrc is incorrect: " << ssrc;
   }
 }