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

webrtc/api/rtpsender.h

Index: webrtc/api/rtpsender.h
diff --git a/webrtc/api/rtpsender.h b/webrtc/api/rtpsender.h
index 33059416e9a63896217dddca968e22b243a935bf..25cc4ed14a97bc8f73595c1f544d0dc6c1072bd4 100644
--- a/webrtc/api/rtpsender.h
+++ b/webrtc/api/rtpsender.h
@@ -23,14 +23,14 @@
 #include "webrtc/base/basictypes.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/scoped_ptr.h"
-#include "webrtc/media/base/audiorenderer.h"
+#include "webrtc/media/base/audiosource.h"
 
 namespace webrtc {
 
 // LocalAudioSinkAdapter receives data callback as a sink to the local
-// AudioTrack, and passes the data to the sink of AudioRenderer.
+// AudioTrack, and passes the data to the sink of AudioSource.
 class LocalAudioSinkAdapter : public AudioTrackSinkInterface,
-                              public cricket::AudioRenderer {
+                              public cricket::AudioSource {
  public:
   LocalAudioSinkAdapter();
   virtual ~LocalAudioSinkAdapter();
@@ -43,10 +43,10 @@ class LocalAudioSinkAdapter : public AudioTrackSinkInterface,
               size_t number_of_channels,
               size_t number_of_frames) override;
 
-  // cricket::AudioRenderer implementation.
-  void SetSink(cricket::AudioRenderer::Sink* sink) override;
+  // cricket::AudioSource implementation.
+  void SetSink(cricket::AudioSource::Sink* sink) override;
 
-  cricket::AudioRenderer::Sink* sink_;
+  cricket::AudioSource::Sink* sink_;
   // Critical section protecting |sink_|.
   rtc::CriticalSection lock_;
 };
@@ -113,7 +113,7 @@ class AudioRtpSender : public ObserverInterface,
   bool stopped_ = false;
 
   // Used to pass the data callback from the |track_| to the other end of
-  // cricket::AudioRenderer.
+  // cricket::AudioSource.
   rtc::scoped_ptr<LocalAudioSinkAdapter> sink_adapter_;
 };