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

media/cast/net/rtp/rtp_defines.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_DEFINES_H_
 #define MEDIA_CAST_NET_RTP_RTP_DEFINES_H_
 
 #include <stdint.h>
 
 #include "media/cast/net/rtcp/rtcp_defines.h"
@@ skipping 16 matching lines @@
 
 // Cast RTP extensions.
 static const uint8_t kCastRtpExtensionAdaptiveLatency = 1;
 
 struct RtpCastHeader {
   RtpCastHeader();
   // Elements from RTP packet header.
   bool marker;
   uint8_t payload_type;
   uint16_t sequence_number;
-  uint32_t rtp_timestamp;
+  RtpTimeTicks rtp_timestamp;
   uint32_t sender_ssrc;
   uint8_t num_csrcs;
 
   // Elements from Cast header (at beginning of RTP payload).
   bool is_key_frame;
   bool is_reference;
   uint32_t frame_id;
   uint16_t packet_id;
   uint16_t max_packet_id;
   uint32_t reference_frame_id;
   uint16_t new_playout_delay_ms;
   uint8_t num_extensions;
 };
 
 class RtpPayloadFeedback {
  public:
   virtual void CastFeedback(const RtcpCastMessage& cast_feedback) = 0;
 
  protected:
   virtual ~RtpPayloadFeedback();
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_RTP_RTP_DEFINES_H_