Render inband text tracks in the media pipeline

media/base/text_track.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_TEXT_TRACK_H_
 #define MEDIA_BASE_TEXT_TRACK_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 19 matching lines @@
                             const std::string& id,
                             const std::string& content,
                             const std::string& settings) = 0;
 };
 
 typedef base::Callback<scoped_ptr<TextTrack>
     (TextKind kind,
      const std::string& label,
      const std::string& language)> AddTextTrackCB;
 
+class DemuxerStream;
+
+typedef base::Callback<void
+    (DemuxerStream* text_stream,
+     scoped_ptr<TextTrack>)> AddTextTrackDoneCB;
+
+// TODO(matthewjheaney): temporary callback name until threading issues
+// have been settled.
+typedef base::Callback<void
+    (DemuxerStream* stream,
+     TextKind kind,
+     const std::string& label,
+     const std::string& language,
+     const AddTextTrackDoneCB& done_cb)> AddTextTrackCB2;
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_TEXT_TRACK_H_