Render inband text tracks in the media pipeline

media/base/mock_filters.h

Index: media/base/mock_filters.h
diff --git a/media/base/mock_filters.h b/media/base/mock_filters.h
index fb5e8a0dfd86aaa86d85fbed65f6676a5cd24407..30d9500c4d2b621488f091ca184f61737a8622ed 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -52,6 +52,7 @@ class MockDemuxerStream : public DemuxerStream {
   MOCK_METHOD1(Read, void(const ReadCB& read_cb));
   virtual AudioDecoderConfig audio_decoder_config() OVERRIDE;
   virtual VideoDecoderConfig video_decoder_config() OVERRIDE;
+  virtual TextTrackConfig text_track_config() OVERRIDE;
   MOCK_METHOD0(EnableBitstreamConverter, void());
 
   void set_audio_decoder_config(const AudioDecoderConfig& config);
@@ -61,6 +62,7 @@ class MockDemuxerStream : public DemuxerStream {
   DemuxerStream::Type type_;
   AudioDecoderConfig audio_decoder_config_;
   VideoDecoderConfig video_decoder_config_;
+  TextTrackConfig text_track_config_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDemuxerStream);
 };