Return buffers from StreamParsers in a single unified map

media/formats/mpeg/mpeg_audio_stream_parser_base.cc

Index: media/formats/mpeg/mpeg_audio_stream_parser_base.cc
diff --git a/media/formats/mpeg/mpeg_audio_stream_parser_base.cc b/media/formats/mpeg/mpeg_audio_stream_parser_base.cc
index 944225a653c3d5b68b6a87f835110b23f767a5f7..0429a74f6e57373bc3268cf6568c372f6a95fc88 100644
--- a/media/formats/mpeg/mpeg_audio_stream_parser_base.cc
+++ b/media/formats/mpeg/mpeg_audio_stream_parser_base.cc
@@ -408,9 +408,9 @@ bool MPEGAudioStreamParserBase::SendBuffers(BufferQueue* buffers,
     new_segment_cb_.Run();
   }
 
-  BufferQueue empty_video_buffers;
-  TextBufferQueueMap empty_text_map;
-  if (!new_buffers_cb_.Run(*buffers, empty_video_buffers, empty_text_map))
+  BufferQueueMap buffer_queue_map;
+  buffer_queue_map.insert(std::make_pair(kMpegAudioTrackId, *buffers));
+  if (!new_buffers_cb_.Run(buffer_queue_map))
     return false;
   buffers->clear();