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

media/cast/receiver/cast_receiver_impl.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_RECEIVER_CAST_RECEIVER_IMPL_H_
 #define MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/cast_receiver.h"
+#include "media/cast/common/rtp_time.h"
 #include "media/cast/net/pacing/paced_sender.h"
 #include "media/cast/receiver/frame_receiver.h"
 
 namespace media {
 namespace cast {
 
 class AudioDecoder;
 class VideoDecoder;
 
 // This is a pure owner class that groups all required receiver-related objects
@@ skipping 34 matching lines @@
 
   // Receives an AudioBus from |audio_decoder_|, logs the event, and passes the
   // data on by running the given |callback|.  This method is static to ensure
   // it can be called after a CastReceiverImpl instance is destroyed.
   // DecodeEncodedAudioFrame() uses this as a callback for
   // AudioDecoder::DecodeFrame().
   static void EmitDecodedAudioFrame(
       const scoped_refptr<CastEnvironment>& cast_environment,
       const AudioFrameDecodedCallback& callback,
       uint32 frame_id,
-      uint32 rtp_timestamp,
+      RtpTimeTicks rtp_timestamp,
       const base::TimeTicks& playout_time,
       scoped_ptr<AudioBus> audio_bus,
       bool is_continuous);
 
   // Receives a VideoFrame from |video_decoder_|, logs the event, and passes the
   // data on by running the given |callback|.  This method is static to ensure
   // it can be called after a CastReceiverImpl instance is destroyed.
   // DecodeEncodedVideoFrame() uses this as a callback for
   // VideoDecoder::DecodeFrame().
   static void EmitDecodedVideoFrame(
       const scoped_refptr<CastEnvironment>& cast_environment,
       const VideoFrameDecodedCallback& callback,
       uint32 frame_id,
-      uint32 rtp_timestamp,
+      RtpTimeTicks rtp_timestamp,
       const base::TimeTicks& playout_time,
       const scoped_refptr<VideoFrame>& video_frame,
       bool is_continuous);
 
   const scoped_refptr<CastEnvironment> cast_environment_;
   FrameReceiver audio_receiver_;
   FrameReceiver video_receiver_;
 
   // Used by DispatchReceivedPacket() to direct packets to the appropriate frame
   // receiver.
@@ skipping 16 matching lines @@
   // images for playback.
   scoped_ptr<VideoDecoder> video_decoder_;
 
   DISALLOW_COPY_AND_ASSIGN(CastReceiverImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_