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..a0494c3c280f962c7eaedb8e33c2124b6340fbc9 100644
--- a/media/filters/source_buffer_stream.cc
+++ b/media/filters/source_buffer_stream.cc
@@ -350,6 +350,25 @@ SourceBufferStream::SourceBufferStream(const VideoDecoderConfig& video_config,
   video_configs_.push_back(video_config);
 }
 
+SourceBufferStream::SourceBufferStream(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) {
+}
+
 SourceBufferStream::~SourceBufferStream() {
   while (!ranges_.empty()) {
     delete ranges_.front();