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

webrtc/pc/channel.h

 /*
  *  Copyright 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 318 matching lines @@
                const std::string& content_name,
                bool rtcp);
   ~VoiceChannel();
   bool Init();
 
   // Configure sending media on the stream with SSRC |ssrc|
   // If there is only one sending stream SSRC 0 can be used.
   bool SetAudioSend(uint32_t ssrc,
                     bool enable,
                     const AudioOptions* options,
-                    AudioRenderer* renderer);
+                    AudioSource* source);
 
   // downcasts a MediaChannel
   virtual VoiceMediaChannel* media_channel() const {
     return static_cast<VoiceMediaChannel*>(BaseChannel::media_channel());
   }
 
   void SetEarlyMedia(bool enable);
   // This signal is emitted when we have gone a period of time without
   // receiving early media. When received, a UI should start playing its
   // own ringing sound
@@ skipping 270 matching lines @@
   // SetSendParameters.
   DataSendParameters last_send_params_;
   // Last DataRecvParameters sent down to the media_channel() via
   // SetRecvParameters.
   DataRecvParameters last_recv_params_;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_SESSION_MEDIA_CHANNEL_H_