Use of the playback time in the MSE garbage collection.

media/filters/chunk_demuxer.h

Index: media/filters/chunk_demuxer.h
diff --git a/media/filters/chunk_demuxer.h b/media/filters/chunk_demuxer.h
index 6e8bdf95c7cde7cd6e767cf9c7b862f0ec0ec1fc..2c6bf8420414dba90131dcd973ec5cbf96103def 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -89,6 +89,9 @@ class MEDIA_EXPORT ChunkDemuxerStream : public DemuxerStream {
   bool SupportsConfigChanges() override;
   VideoRotation video_rotation() override;
 
+  // Update the media time used by the MSE garbage collection algorithm.
+  void NotifyMediaTimeUpdate(DecodeTimestamp time);
+
   // Returns the text track configuration.  It is an error to call this method
   // if type() != TEXT.
   TextTrackConfig text_track_config();
@@ -163,6 +166,11 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
                bool splice_frames_enabled);
   ~ChunkDemuxer() override;
 
+  // Set the media time provider.
+  // TODO(damienv): should truly be part of the constructor.
+  void SetMediaTimeProvider(
+      const base::Callback<base::TimeDelta(void)>& get_media_time_cb);
+
   // Demuxer implementation.
   void Initialize(DemuxerHost* host,
                   const PipelineStatusCB& cb,
@@ -376,6 +384,8 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   scoped_ptr<ChunkDemuxerStream> audio_;
   scoped_ptr<ChunkDemuxerStream> video_;
 
+  base::Callback<base::TimeDelta(void)> get_media_time_cb_;
+
   base::TimeDelta duration_;
 
   // The duration passed to the last SetDuration(). If