Use of the playback time in the MSE garbage collection.

media/filters/chunk_demuxer.cc

Index: media/filters/chunk_demuxer.cc
diff --git a/media/filters/chunk_demuxer.cc b/media/filters/chunk_demuxer.cc
index 1b57c3a1b18d35587bf6f07e8b2f6a68c258f15f..d0b4e4ad956ec7b8e1c0f2b30d15aeaa1f1d9586 100644
--- a/media/filters/chunk_demuxer.cc
+++ b/media/filters/chunk_demuxer.cc
@@ -1032,6 +1032,11 @@ void ChunkDemuxerStream::SetLiveness(Liveness liveness) {
   liveness_ = liveness;
 }
 
+void ChunkDemuxerStream::NotifyMediaTimeUpdate(DecodeTimestamp media_time) {
+  base::AutoLock auto_lock(lock_);
+  stream_->NotifyMediaTimeUpdate(media_time);
+}
+
 void ChunkDemuxerStream::ChangeState_Locked(State state) {
   lock_.AssertAcquired();
   DVLOG(1) << "ChunkDemuxerStream::ChangeState_Locked() : "
@@ -1124,6 +1129,11 @@ ChunkDemuxer::ChunkDemuxer(
   DCHECK(!encrypted_media_init_data_cb_.is_null());
 }
 
+void ChunkDemuxer::SetMediaTimeProvider(
+    const base::Callback<base::TimeDelta(void)>& get_media_time_cb) {
+  get_media_time_cb_ = get_media_time_cb;
+}
+
 void ChunkDemuxer::Initialize(
     DemuxerHost* host,
     const PipelineStatusCB& cb,
@@ -1332,6 +1342,15 @@ void ChunkDemuxer::AppendData(
 
   Ranges<TimeDelta> ranges;
 
+  if (!get_media_time_cb_.is_null()) {
+    DecodeTimestamp current_media_time =
+        DecodeTimestamp::FromPresentationTime(get_media_time_cb_.Run());
+    if (audio_)
+      audio_->NotifyMediaTimeUpdate(current_media_time);
+    if (video_)
+      video_->NotifyMediaTimeUpdate(current_media_time);
+  }
+
   {
     base::AutoLock auto_lock(lock_);
     DCHECK_NE(state_, ENDED);