Cast: Refactor RTCP handling

media/cast/net/rtcp/rtcp_defines.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAST_RTCP_RTCP_DEFINES_H_
 #define MEDIA_CAST_RTCP_RTCP_DEFINES_H_
 
 #include <map>
 #include <set>
 
@@ skipping 109 matching lines @@
   // Time of event logged.
   base::TimeTicks timestamp;
 
   // Render/playout delay. Only set for FRAME_PLAYOUT events.
   base::TimeDelta delay_delta;
 
   // Only set for packet events.
   uint16 packet_id;
 };
 
+typedef base::Callback<void(const RtcpCastMessage&)> RtcpCastMessageCallback;
+typedef base::Callback<void(base::TimeDelta,
+                            base::TimeDelta,
+                            base::TimeDelta,
+                            base::TimeDelta)> RtcpRttCallback;
+typedef
+base::Callback<void(const RtcpReceiverLogMessage&)> RtcpLogMessageCallback;
+
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RTCP_RTCP_DEFINES_H_