Implement core of compliant MediaSource coded frame processing

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 1c1a361cd0fb2e795d19a32f0130a0b9307dc2b9..9b96c6dd3faa009f6650dc7eece46f953f9536bc 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -232,6 +232,12 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   // mode.
   void SetSequenceMode(const std::string& id, bool sequence_mode);
 
+  // Signals the coded frame processor for the source buffer associated with
+  // |id| to update its group start timestamp to be |timestamp_offset| if it is
+  // in sequence append mode.
+  void SetGroupStartTimestampIfInSequenceMode(const std::string& id,
+                                              base::TimeDelta timestamp_offset);
+
   // Called to signal changes in the "end of stream"
   // state. UnmarkEndOfStream() must not be called if a matching
   // MarkEndOfStream() has not come before it.
@@ -283,8 +289,6 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
 
   void OnNewTextTrack(ChunkDemuxerStream* text_stream,
                       const TextTrackConfig& config);
-  void OnNewMediaSegment(const std::string& source_id,
-                         base::TimeDelta start_timestamp);
 
   // Returns true if |source_id| is valid, false otherwise.
   bool IsValidId(const std::string& source_id) const;