Media Source dispatches inband text tracks

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 7369c08ad8b832fc4fb29ea37ee87fe26f2b8407..747305d072b03543f09608e7bbc727bb8b8d5471 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -286,6 +286,7 @@
         'base/stream_parser.h',
         'base/stream_parser_buffer.cc',
         'base/stream_parser_buffer.h',
+        'base/text_track.h',
         'base/video_decoder.cc',
         'base/video_decoder.h',
         'base/video_decoder_config.cc',
@@ -447,6 +448,8 @@
         'webm/webm_tracks_parser.h',
         'webm/webm_video_client.cc',
         'webm/webm_video_client.h',
+        'webm/webm_webvtt_parser.cc',
+        'webm/webm_webvtt_parser.h'
       ],
       'direct_dependent_settings': {
         'include_dirs': [
@@ -1002,6 +1005,7 @@
         'webm/webm_content_encodings_client_unittest.cc',
         'webm/webm_parser_unittest.cc',
         'webm/webm_tracks_parser_unittest.cc',
+        'webm/webm_webvtt_parser_unittest.cc',
       ],
       'conditions': [
         ['arm_neon == 1', {