Render inband text tracks in the media pipeline

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 5554a288334b4cbd9492ffa2609324a8e77ac288..17dbd2af8a29b3955df05f45ac5c74ce8d1e2b94 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -302,6 +302,12 @@
         'base/stream_parser.h',
         'base/stream_parser_buffer.cc',
         'base/stream_parser_buffer.h',
+        'base/text_buffer.cc',
+        'base/text_buffer.h',
+        'base/text_decoder.cc',
+        'base/text_decoder.h',
+        'base/text_renderer.cc',
+        'base/text_renderer.h',
         'base/text_track.h',
         'base/user_input_monitor.cc',
         'base/user_input_monitor.h',
@@ -350,6 +356,8 @@
         'filters/ffmpeg_glue.h',
         'filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc',
         'filters/ffmpeg_h264_to_annex_b_bitstream_converter.h',
+        'filters/ffmpeg_text_decoder.cc',
+        'filters/ffmpeg_text_decoder.h',
         'filters/ffmpeg_video_decoder.cc',
         'filters/ffmpeg_video_decoder.h',
         'filters/file_data_source.cc',
@@ -370,6 +378,8 @@
         'filters/source_buffer_stream.h',
         'filters/stream_parser_factory.cc',
         'filters/stream_parser_factory.h',
+        'filters/text_renderer_impl.cc',
+        'filters/text_renderer_impl.h',
         'filters/video_decoder_selector.cc',
         'filters/video_decoder_selector.h',
         'filters/video_frame_stream.cc',