Render inband text tracks in the media pipeline

media/base/demuxer_stream.h

Index: media/base/demuxer_stream.h
diff --git a/media/base/demuxer_stream.h b/media/base/demuxer_stream.h
index bb4534475ed14099c92a2cfec0ffb75e2f18584a..60cb91a075041e00d129c415f3ce1d74e5ebf1c0 100644
--- a/media/base/demuxer_stream.h
+++ b/media/base/demuxer_stream.h
@@ -13,6 +13,7 @@ namespace media {
 
 class AudioDecoderConfig;
 class DecoderBuffer;
+class TextTrackConfig;
 class VideoDecoderConfig;
 
 class MEDIA_EXPORT DemuxerStream {
@@ -21,6 +22,7 @@ class MEDIA_EXPORT DemuxerStream {
     UNKNOWN,
     AUDIO,
     VIDEO,
+    TEXT,
     NUM_TYPES,  // Always keep this entry as the last one!
   };
 
@@ -62,6 +64,10 @@ class MEDIA_EXPORT DemuxerStream {
   // if type() != VIDEO.
   virtual VideoDecoderConfig video_decoder_config() = 0;
 
+  // Returns the text track configuration.  It is an error to call this method
+  // if type() != TEXT.
+  virtual TextTrackConfig text_track_config() = 0;

[acolwell GONE FROM CHROMIUM, 2013/10/21 20:10:40]

nit: Is this really needed on the DemuxerStream interface? I don't see anything
outside of ChunkDemuxer needing it.

[Matthew Heaney (Chromium), 2013/10/23 05:09:01]

Done.

+
   // Returns the type of stream.
   virtual Type type() = 0;