[Cast] Clean-up RtpCastHeader and RtpParser, removing the last WebRTC dependency.

media/cast/video_receiver/video_receiver.cc

 // 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.
 
 #include "media/cast/video_receiver/video_receiver.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 297 matching lines @@
                                           size_t payload_size,
                                           const RtpCastHeader& rtp_header) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
 
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
   if (time_incoming_packet_.is_null() ||
       now - time_incoming_packet_ >
           base::TimeDelta::FromMilliseconds(kMinTimeBetweenOffsetUpdatesMs)) {
     if (time_incoming_packet_.is_null())
       InitializeTimers();
-    incoming_rtp_timestamp_ = rtp_header.webrtc.header.timestamp;
+    incoming_rtp_timestamp_ = rtp_header.rtp_timestamp;
     // The following incoming packet info is used for syncing sender and
     // receiver clock. Use only the first packet of every frame to obtain a
     // minimal value.
     if (rtp_header.packet_id == 0) {
       time_incoming_packet_ = now;
       time_incoming_packet_updated_ = true;
     }
   }
 
   frame_id_to_rtp_timestamp_[rtp_header.frame_id & 0xff] =
-      rtp_header.webrtc.header.timestamp;
+      rtp_header.rtp_timestamp;
   cast_environment_->Logging()->InsertPacketEvent(
       now,
       kVideoPacketReceived,
-      rtp_header.webrtc.header.timestamp,
+      rtp_header.rtp_timestamp,
       rtp_header.frame_id,
       rtp_header.packet_id,
       rtp_header.max_packet_id,
       payload_size);
 
   bool duplicate = false;
   const bool complete =
       framer_.InsertPacket(payload_data, payload_size, rtp_header, &duplicate);
   if (duplicate) {
     cast_environment_->Logging()->InsertPacketEvent(
         now,
         kDuplicateVideoPacketReceived,
-        rtp_header.webrtc.header.timestamp,
+        rtp_header.rtp_timestamp,
         rtp_header.frame_id,
         rtp_header.packet_id,
         rtp_header.max_packet_id,
         payload_size);
     // Duplicate packets are ignored.
     return;
   }
   if (!complete)
     return;  // Video frame not complete; wait for more packets.
 
@@ skipping 57 matching lines @@
 }
 
 void VideoReceiver::SendNextRtcpReport() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   rtcp_.SendRtcpFromRtpReceiver(NULL, NULL);
   ScheduleNextRtcpReport();
 }
 
 }  // namespace cast
 }  // namespace media