Cast: Add capabity to parse receiver and sender log messages over RTCP.

media/cast/rtcp/rtcp_receiver.h

Index: media/cast/rtcp/rtcp_receiver.h
diff --git a/media/cast/rtcp/rtcp_receiver.h b/media/cast/rtcp/rtcp_receiver.h
index bdb21a1a9b74d2a399a84be48ed6d39cb4b058bd..c0b62aa3889f05edc5a15952a7e8b175afa15e5d 100644
--- a/media/cast/rtcp/rtcp_receiver.h
+++ b/media/cast/rtcp/rtcp_receiver.h
@@ -95,6 +95,12 @@ class RtcpReceiver {
       const RtcpField* rtcp_field,
       MissingFramesAndPacketsMap* missing_frames_and_packets);
 
+  void HandleApplicationSpecificCastReceiverLog(RtcpParser* rtcp_parser);
+  void HandleApplicationSpecificCastSenderLog(RtcpParser* rtcp_parser);
+  void HandleApplicationSpecificCastReceiverEventLog(
+      RtcpParser* rtcp_parser,
+      RtcpReceiverEventLogMessages* event_log_messages);
+
   const uint32 ssrc_;
   uint32 remote_ssrc_;