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

media/cast/sender/audio_sender.cc

 // 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.
 
 #include "media/cast/sender/audio_sender.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "media/cast/common/rtp_time.h"
 #include "media/cast/net/cast_transport_config.h"
 #include "media/cast/sender/audio_encoder.h"
 
 namespace media {
 namespace cast {
 
 AudioSender::AudioSender(scoped_refptr<CastEnvironment> cast_environment,
                          const AudioSenderConfig& audio_config,
                          const StatusChangeCallback& status_change_cb,
                          CastTransportSender* const transport_sender)
@@ skipping 57 matching lines @@
 void AudioSender::InsertAudio(scoped_ptr<AudioBus> audio_bus,
                               const base::TimeTicks& recorded_time) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
 
   if (!audio_encoder_) {
     NOTREACHED();
     return;
   }
 
   const base::TimeDelta next_frame_duration =
-      RtpDeltaToTimeDelta(audio_bus->frames(), rtp_timebase());
+      RtpTimeDelta::FromTicks(audio_bus->frames()).ToTimeDelta(rtp_timebase());
   if (ShouldDropNextFrame(next_frame_duration))
     return;
 
   samples_in_encoder_ += audio_bus->frames();
 
   audio_encoder_->InsertAudio(std::move(audio_bus), recorded_time);
 }
 
 int AudioSender::GetNumberOfFramesInEncoder() const {
   // Note: It's possible for a partial frame to be in the encoder, but returning
   // the floor() is good enough for the "design limit" check in FrameSender.
   return samples_in_encoder_ / audio_encoder_->GetSamplesPerFrame();
 }
 
 base::TimeDelta AudioSender::GetInFlightMediaDuration() const {
   const int samples_in_flight = samples_in_encoder_ +
       GetUnacknowledgedFrameCount() * audio_encoder_->GetSamplesPerFrame();
-  return RtpDeltaToTimeDelta(samples_in_flight, rtp_timebase());
+  return RtpTimeDelta::FromTicks(samples_in_flight).ToTimeDelta(rtp_timebase());
 }
 
 void AudioSender::OnEncodedAudioFrame(
     int encoder_bitrate,
     scoped_ptr<SenderEncodedFrame> encoded_frame,
     int samples_skipped) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
 
   samples_in_encoder_ -= audio_encoder_->GetSamplesPerFrame() + samples_skipped;
   DCHECK_GE(samples_in_encoder_, 0);
 
   SendEncodedFrame(encoder_bitrate, std::move(encoded_frame));
 }
 
 }  // namespace cast
 }  // namespace media