Cast: Deduplicate event types in cast library.

media/cast/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 93 matching lines @@
 
 inline bool operator==(RtcpReceiverReferenceTimeReport lhs,
                        RtcpReceiverReferenceTimeReport rhs) {
   return lhs.remote_ssrc == rhs.remote_ssrc &&
          lhs.ntp_seconds == rhs.ntp_seconds &&
          lhs.ntp_fraction == rhs.ntp_fraction;
 }
 
 // Struct used by raw event subscribers as an intermediate format before
 // sending off to the other side via RTCP.
-// (i.e., WindowedRtcpEventRtp{Sender,Receiver}Subscriber)
+// (i.e., {Sender,Receiver}RtcpEventSubscriber)
 struct RtcpEvent {
   RtcpEvent();
   ~RtcpEvent();
 
   CastLoggingEvent type;
 
   // Time of event logged.
   base::TimeTicks timestamp;
 
-  // Render/playout delay. Only set for kAudioPlayoutDelay and
-  // kVideoRenderDelay events.
+  // Render/playout delay. Only set for FRAME_PLAYOUT events.
   base::TimeDelta delay_delta;
 
-  // Only set for packet events. (kAudioPacketReceived, kVideoPacketReceived)
+  // Only set for packet events.
   uint16 packet_id;
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RTCP_RTCP_DEFINES_H_