Added support for sending and receiving RTCP XR packets:

- Receiver reference time report block
- DLRR report block (RFC3611).

BUG=1613
R=mflodman@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2196010

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4898 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

@@ -1536,6 +1536,11 @@ uint32_t ModuleRtpRtcpImpl::SendTimeOfSendReport(
   return rtcp_sender_.SendTimeOfSendReport(send_report);
 }
 
+bool ModuleRtpRtcpImpl::SendTimeOfXrRrReport(
+    uint32_t mid_ntp, int64_t* time_ms) const {
+  return rtcp_sender_.SendTimeOfXrRrReport(mid_ntp, time_ms);
+}
+
 void ModuleRtpRtcpImpl::OnReceivedNACK(
     const std::list<uint16_t>& nack_sequence_numbers) {
   if (!rtp_sender_.StorePackets() ||
@@ -1566,6 +1571,11 @@ int32_t ModuleRtpRtcpImpl::LastReceivedNTP(
   return 0;
 }
 
+bool ModuleRtpRtcpImpl::LastReceivedXrReferenceTimeInfo(
+    RtcpReceiveTimeInfo* info) const {
+  return rtcp_receiver_.LastReceivedXrReferenceTimeInfo(info);
+}
+
 bool ModuleRtpRtcpImpl::UpdateRTCPReceiveInformationTimers() {
   // If this returns true this channel has timed out.
   // Periodically check if this is true and if so call UpdateTMMBR.