MSE: Relax the 'media segment must begin with keyframe' requirement

media/formats/mp4/mp4_stream_parser.h

Index: media/formats/mp4/mp4_stream_parser.h
diff --git a/media/formats/mp4/mp4_stream_parser.h b/media/formats/mp4/mp4_stream_parser.h
index 2ffe64033483d3c5a557b9a9cc42aa5307e2f92a..77354536827e3284947cbbfae33b3bd5cb4761ae 100644
--- a/media/formats/mp4/mp4_stream_parser.h
+++ b/media/formats/mp4/mp4_stream_parser.h
@@ -33,7 +33,7 @@ class MEDIA_EXPORT MP4StreamParser : public StreamParser {
             const NewBuffersCB& new_buffers_cb,
             bool ignore_text_tracks,
             const EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
-            const NewMediaSegmentCB& new_segment_cb,
+            const base::Closure& start_of_segment_cb,
             const base::Closure& end_of_segment_cb,
             const scoped_refptr<MediaLog>& media_log) override;
   void Flush() override;
@@ -93,7 +93,7 @@ class MEDIA_EXPORT MP4StreamParser : public StreamParser {
   NewConfigCB config_cb_;
   NewBuffersCB new_buffers_cb_;
   EncryptedMediaInitDataCB encrypted_media_init_data_cb_;
-  NewMediaSegmentCB new_segment_cb_;
+  base::Closure start_of_segment_cb_;
   base::Closure end_of_segment_cb_;
   scoped_refptr<MediaLog> media_log_;