Add RtcpRttStats to AudioStream

webrtc/voice_engine/channel_proxy.h

Index: webrtc/voice_engine/channel_proxy.h
diff --git a/webrtc/voice_engine/channel_proxy.h b/webrtc/voice_engine/channel_proxy.h
index d84e73b60f605d513e7dd5fc9cc91d48174523cb..1d0116d969d8cbfe3dbb7e990110e01f2d876c0a 100644
--- a/webrtc/voice_engine/channel_proxy.h
+++ b/webrtc/voice_engine/channel_proxy.h
@@ -25,6 +25,7 @@ namespace webrtc {
 class AudioSinkInterface;
 class PacketRouter;
 class RtcEventLog;
+class RtcpRttStats;
 class RtpPacketSender;
 class Transport;
 class TransportFeedbackObserver;
@@ -91,6 +92,8 @@ class ChannelProxy {
 
   virtual void SetRtcEventLog(RtcEventLog* event_log);
 
+  virtual void SetRtcpRttStats(RtcpRttStats* rtcp_rtt_stats);
+
  private:
   Channel* channel() const;