Combining SetVideoSend and SetSource into one method.

webrtc/api/rtpsender.h

Index: webrtc/api/rtpsender.h
diff --git a/webrtc/api/rtpsender.h b/webrtc/api/rtpsender.h
index ffe5daeb0107a666fa1172174f1887f2379604b2..c8a46a80e4d7d462cb6d193e98f8c80425f071cc 100644
--- a/webrtc/api/rtpsender.h
+++ b/webrtc/api/rtpsender.h
@@ -171,6 +171,8 @@ class VideoRtpSender : public ObserverInterface,
   // Helper function to construct options for
   // VideoProviderInterface::SetVideoSend.
   void SetVideoSend();
+  // Helper function to call SetVideoSend with "stop sending" parameters.
+  void ClearVideoSend();
 
   std::string id_;
   std::string stream_id_;