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

media/cast/audio_receiver/audio_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/audio_receiver/audio_receiver.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 59 matching lines @@
 
 void AudioReceiver::OnReceivedPayloadData(const uint8* payload_data,
                                           size_t payload_size,
                                           const RtpCastHeader& rtp_header) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
 
   // TODO(pwestin): update this as video to refresh over time.
   if (time_first_incoming_packet_.is_null()) {
     InitializeTimers();
-    first_incoming_rtp_timestamp_ = rtp_header.webrtc.header.timestamp;
+    first_incoming_rtp_timestamp_ = rtp_header.rtp_timestamp;
     time_first_incoming_packet_ = now;
   }
 
   frame_id_to_rtp_timestamp_[rtp_header.frame_id & 0xff] =
-      rtp_header.webrtc.header.timestamp;
+      rtp_header.rtp_timestamp;
   cast_environment_->Logging()->InsertPacketEvent(
-      now, kAudioPacketReceived, rtp_header.webrtc.header.timestamp,
+      now, kAudioPacketReceived, 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,
         kDuplicateAudioPacketReceived,
-        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;
 
@@ skipping 264 matching lines @@
 }
 
 void AudioReceiver::SendNextCastMessage() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   framer_.SendCastMessage();  // Will only send a message if it is time.
   ScheduleNextCastMessage();
 }
 
 }  // namespace cast
 }  // namespace media