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 6324d79aee1c489f0dace94b9c0e85102873be74..807839370bc4de79ea2a66688d38e1adaa82fedb 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -23,7 +23,7 @@ namespace media {
 class FFmpegURLProtocol;
 class SourceState;
 
-class ChunkDemuxerStream : public DemuxerStream {
+class MEDIA_EXPORT ChunkDemuxerStream : public DemuxerStream {
  public:
   typedef std::deque<scoped_refptr<StreamParserBuffer> > BufferQueue;
 
@@ -193,10 +193,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   // Registers a new |id| to use for AppendData() calls. |type| indicates
   // the MIME type for the data that we intend to append for this ID.
   // |use_legacy_frame_processor| determines which of LegacyFrameProcessor or
-  // a (not yet implemented) more compliant frame processor to use to process
-  // parsed frames from AppendData() calls.
-  // TODO(wolenetz): Enable usage of new frame processor based on this flag.
-  // See http://crbug.com/249422.
+  // FrameProcessor to use to process parsed frames from AppendData() calls.
   // kOk is returned if the demuxer has enough resources to support another ID
   //    and supports the format indicated by |type|.
   // kNotSupported is returned if |type| is not a supported format.
@@ -255,6 +252,12 @@ 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.