| Index: webrtc/pc/rtpreceiver.h
 | 
| diff --git a/webrtc/pc/rtpreceiver.h b/webrtc/pc/rtpreceiver.h
 | 
| index 513f90c7ab3d9a00796868fe32a85bf5069e7d85..1568b47301b353dec01bbd0a50f425ee7f5f8f2e 100644
 | 
| --- a/webrtc/pc/rtpreceiver.h
 | 
| +++ b/webrtc/pc/rtpreceiver.h
 | 
| @@ -88,6 +88,8 @@ class AudioRtpReceiver : public ObserverInterface,
 | 
|    // Should call SetChannel(nullptr) before |channel| is destroyed.
 | 
|    void SetChannel(cricket::VoiceChannel* channel);
 | 
|  
 | 
| +  std::vector<RtpContributingSource> GetContributingSources() override;
 | 
| +
 | 
|   private:
 | 
|    void Reconfigure();
 | 
|    void OnFirstPacketReceived(cricket::BaseChannel* channel);
 | 
| 
 |