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 632c425f5ad4809f6dc45e2f25de5b17ca515214..337f6d0c2237552f2acd6858cfb5946d9460a619 100644
--- a/media/cast/rtcp/rtcp_receiver.h
+++ b/media/cast/rtcp/rtcp_receiver.h
@@ -96,6 +96,12 @@ 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_;