ab9e3bac46
This is equivalent to DashTrackSelector and SmoothStreamingTrackSelector. This is a step toward allowing HlsChunkSource to expose multiple tracks, which is a requirement for supporting WebVtt. This change also enables WebVtt extractor instantiation. Issue: #151 Issue: #676 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=111698833