Render inband text tracks in the media pipeline

media/filters/source_buffer_stream.cc

Index: media/filters/source_buffer_stream.cc
diff --git a/media/filters/source_buffer_stream.cc b/media/filters/source_buffer_stream.cc
index 8a797de81a08a6a8c8f368976208f9d8f60fef62..936603a2881e9780e20f3402e6c4c9a722401e01 100644
--- a/media/filters/source_buffer_stream.cc
+++ b/media/filters/source_buffer_stream.cc
@@ -350,6 +350,28 @@ SourceBufferStream::SourceBufferStream(const VideoDecoderConfig& video_config,
   video_configs_.push_back(video_config);
 }
 
+SourceBufferStream::SourceBufferStream(const TextTrackConfig& text_config,
+                                       const LogCB& log_cb)
+    : log_cb_(log_cb),
+      current_config_index_(0),
+      append_config_index_(0),
+      seek_pending_(false),
+      end_of_stream_(false),
+      seek_buffer_timestamp_(kNoTimestamp()),
+      selected_range_(NULL),
+      media_segment_start_time_(kNoTimestamp()),
+      range_for_next_append_(ranges_.end()),
+      new_media_segment_(false),
+      last_appended_buffer_timestamp_(kNoTimestamp()),
+      last_appended_buffer_is_keyframe_(false),
+      last_output_buffer_timestamp_(kNoTimestamp()),
+      max_interbuffer_distance_(kNoTimestamp()),
+      memory_limit_(kDefaultAudioMemoryLimit),
+      config_change_pending_(false) {
+  // TODO(matthewjheaney): does this need to be a vector?
+  text_track_config_ = text_config;
+}
+
 SourceBufferStream::~SourceBufferStream() {
   while (!ranges_.empty()) {
     delete ranges_.front();
@@ -1231,6 +1253,10 @@ const VideoDecoderConfig& SourceBufferStream::GetCurrentVideoDecoderConfig() {
   return video_configs_[current_config_index_];
 }
 
+const TextTrackConfig& SourceBufferStream::GetCurrentTextTrackConfig() {
+  return text_track_config_;
+}
+
 base::TimeDelta SourceBufferStream::GetMaxInterbufferDistance() const {
   if (max_interbuffer_distance_ == kNoTimestamp())
     return base::TimeDelta::FromMilliseconds(kDefaultBufferDurationInMs);