MSE: Log a warning if muxed AV media segment has no A or has no V block

media/base/stream_parser.h

Index: media/base/stream_parser.h
diff --git a/media/base/stream_parser.h b/media/base/stream_parser.h
index 27ebc3f0a59190ba83719fe179834eadd41baccd..11740c9d1c6eeb9c67dce7d34de271b3a1c9e99b 100644
--- a/media/base/stream_parser.h
+++ b/media/base/stream_parser.h
@@ -106,6 +106,9 @@ class MEDIA_EXPORT StreamParser {
   // Signals the beginning of a new media segment.
   typedef base::Callback<void()> NewMediaSegmentCB;
 
+  // Signals the end of a media segment.
+  typedef base::Callback<void()> EndMediaSegmentCB;
+
   // A new potentially encrypted stream has been parsed.
   // First parameter - The type of the initialization data associated with the
   //                   stream.
@@ -128,12 +131,13 @@ class MEDIA_EXPORT StreamParser {
       bool ignore_text_track,
       const EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
       const NewMediaSegmentCB& new_segment_cb,
-      const base::Closure& end_of_segment_cb,
+      const EndMediaSegmentCB& end_of_segment_cb,
       const scoped_refptr<MediaLog>& media_log) = 0;
 
-  // Called when a seek occurs. This flushes the current parser state
-  // and puts the parser in a state where it can receive data for the new seek
-  // point.
+  // Called during the reset parser state algorithm.  This flushes the current
+  // parser and puts the parser in a state where it can receive data.  This
+  // method does not need to invoke the EndMediaSegmentCB since the parser reset
+  // algorithm already resets the segment parsing state.
   virtual void Flush() = 0;
 
   // Called when there is new data to parse.