Rename media::Clock to media::TimeDeltaInterpolator and update API.

media/base/android/media_source_player.cc

Index: media/base/android/media_source_player.cc
diff --git a/media/base/android/media_source_player.cc b/media/base/android/media_source_player.cc
index 611c31338358e2098525ce20cea4e05df41c900b..01659556aecafecbdc2562dfaf0130b0d52b256d 100644
--- a/media/base/android/media_source_player.cc
+++ b/media/base/android/media_source_player.cc
@@ -38,7 +38,7 @@ MediaSourcePlayer::MediaSourcePlayer(
       demuxer_(demuxer.Pass()),
       pending_event_(NO_EVENT_PENDING),
       playing_(false),
-      clock_(&default_tick_clock_),
+      interpolator_(&default_tick_clock_),
       doing_browser_seek_(false),
       pending_seek_(false),
       drm_bridge_(NULL),
@@ -62,7 +62,7 @@ MediaSourcePlayer::MediaSourcePlayer(
       base::Bind(&MediaSourcePlayer::OnDemuxerConfigsChanged,
                  weak_factory_.GetWeakPtr())));
   demuxer_->Initialize(this);
-  clock_.SetMaxTime(base::TimeDelta());
+  interpolator_.SetUpperBound(base::TimeDelta());
   weak_this_ = weak_factory_.GetWeakPtr();
 }
 
@@ -90,7 +90,7 @@ void MediaSourcePlayer::ScheduleSeekEventAndStopDecoding(
 
   pending_seek_ = false;
 
-  clock_.SetTime(seek_time, seek_time);
+  interpolator_.SetBounds(seek_time, seek_time);
 
   if (audio_decoder_job_->is_decoding())
     audio_decoder_job_->StopDecode();
@@ -173,7 +173,7 @@ void MediaSourcePlayer::SeekTo(base::TimeDelta timestamp) {
 }
 
 base::TimeDelta MediaSourcePlayer::GetCurrentTime() {
-  return std::min(clock_.Elapsed(), duration_);
+  return std::min(interpolator_.GetInterpolatedTime(), duration_);
 }
 
 base::TimeDelta MediaSourcePlayer::GetDuration() {
@@ -328,7 +328,7 @@ void MediaSourcePlayer::OnDemuxerSeekDone(
     DCHECK(seek_time >= GetCurrentTime());
     DVLOG(1) << __FUNCTION__ << " : setting clock to actual browser seek time: "
              << seek_time.InSecondsF();
-    clock_.SetTime(seek_time, seek_time);
+    interpolator_.SetBounds(seek_time, seek_time);
     audio_decoder_job_->SetBaseTimestamp(seek_time);
   } else {
     DCHECK(actual_browser_seek_time == kNoTimestamp());
@@ -354,7 +354,8 @@ void MediaSourcePlayer::OnDemuxerSeekDone(
 void MediaSourcePlayer::UpdateTimestamps(
     base::TimeDelta current_presentation_timestamp,
     base::TimeDelta max_presentation_timestamp) {
-  clock_.SetTime(current_presentation_timestamp, max_presentation_timestamp);
+  interpolator_.SetBounds(current_presentation_timestamp,
+                          max_presentation_timestamp);
   manager()->OnTimeUpdate(player_id(), GetCurrentTime());
 }
 
@@ -489,7 +490,7 @@ void MediaSourcePlayer::MediaDecoderCallback(
 
   if (!playing_) {
     if (is_clock_manager)
-      clock_.Pause();
+      interpolator_.StopInterpolating();
     return;
   }
 
@@ -571,7 +572,7 @@ void MediaSourcePlayer::PlaybackCompleted(bool is_audio) {
 
   if (AudioFinished() && VideoFinished()) {
     playing_ = false;
-    clock_.Pause();
+    interpolator_.StopInterpolating();
     start_time_ticks_ = base::TimeTicks();
     manager()->OnPlaybackComplete(player_id());
   }
@@ -670,8 +671,8 @@ void MediaSourcePlayer::OnPrefetchDone() {
 
   start_time_ticks_ = base::TimeTicks::Now();
   start_presentation_timestamp_ = GetCurrentTime();
-  if (!clock_.IsPlaying())
-    clock_.Play();
+  if (!interpolator_.interpolating())
+    interpolator_.StartInterpolating();
 
   if (!AudioFinished())
     DecodeMoreAudio();