Implement core of compliant MediaSource coded frame processing

media/filters/legacy_frame_processor.cc

Index: media/filters/legacy_frame_processor.cc
diff --git a/media/filters/legacy_frame_processor.cc b/media/filters/legacy_frame_processor.cc
index ba4cce142ae31e9fc1966d7346abd89700d79de9..843cdc1f9c1fdb578d217f9650174c6fc6474c76 100644
--- a/media/filters/legacy_frame_processor.cc
+++ b/media/filters/legacy_frame_processor.cc
@@ -26,6 +26,13 @@ void LegacyFrameProcessor::SetSequenceMode(bool sequence_mode) {
   sequence_mode_ = sequence_mode;
 }
 
+void LegacyFrameProcessor::SetGroupStartTimestampIfInSequenceMode(
+    base::TimeDelta timestamp_offset) {
+  DVLOG(2) << __FUNCTION__ << "(" << timestamp_offset.InSecondsF() << ")";
+  // Legacy frame processor does not support sequence mode nor does it observe
+  // a group start timestamp.
+}
+
 bool LegacyFrameProcessor::ProcessFrames(
     const StreamParser::BufferQueue& audio_buffers,
     const StreamParser::BufferQueue& video_buffers,
@@ -50,10 +57,6 @@ bool LegacyFrameProcessor::ProcessFrames(
   MseTrackBuffer* video_track = FindTrack(kVideoTrackId);
   DCHECK(video_buffers.empty() || video_track);
 
-  // TODO(wolenetz): DCHECK + return false if any of these buffers have UNKNOWN
-  // type() in upcoming coded frame processing compliant implementation. See
-  // http://crbug.com/249422.
-
   StreamParser::BufferQueue filtered_audio;
   StreamParser::BufferQueue filtered_video;
 
@@ -87,11 +90,7 @@ bool LegacyFrameProcessor::ProcessFrames(
     }
 
     *new_media_segment = false;
-
-    for (TrackBufferMap::iterator itr = track_buffers_.begin();
-         itr != track_buffers_.end(); ++itr) {
-      itr->second->stream()->OnNewMediaSegment(segment_timestamp);
-    }
+    NotifyNewMediaSegmentStarting(segment_timestamp);
   }
 
   if (!filtered_audio.empty() &&