Replace uses of raw uint32's with a type-checked RtpTimeTicks data type.

media/cast/net/rtp/rtp_parser.h

 // Copyright 2014 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_NET_RTP_RTP_PARSER_H_
 #define MEDIA_CAST_NET_RTP_RTP_PARSER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 24 matching lines @@
                    size_t length,
                    RtpCastHeader* rtp_header,
                    const uint8_t** payload_data,
                    size_t* payload_size);
 
   static bool ParseSsrc(const uint8_t* packet, size_t length, uint32_t* ssrc);
 
  private:
   const uint32_t expected_sender_ssrc_;
   const uint8_t expected_payload_type_;
+
+  // Tracks recently-parsed RTP timestamps so that it can expand the truncated
+  // values found in packets.
+  RtpTimeTicks last_parsed_rtp_timestamp_;
+
   FrameIdWrapHelper frame_id_wrap_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(RtpParser);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_RTP_RTP_PARSER_H_