Added API for enabling/disabling RTCP Receiver Reference Time extension.

R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/3419005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5147 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/video_engine/vie_rtp_rtcp_impl.h b/video_engine/vie_rtp_rtcp_impl.h
index d7c7661..caabd2c 100644
--- a/video_engine/vie_rtp_rtcp_impl.h
+++ b/video_engine/vie_rtp_rtcp_impl.h
@@ -88,6 +88,7 @@
   virtual int SetReceiveAbsoluteSendTimeStatus(int video_channel,
                                                bool enable,
                                                int id);
+  virtual int SetRtcpXrRrtrStatus(int video_channel, bool enable);
   virtual int SetTransmissionSmoothingStatus(int video_channel, bool enable);
   virtual int GetReceiveChannelRtcpStatistics(const int video_channel,
                                               RtcpStatistics& basic_stats,