efe76def89
This CL adds the support of CSS styling in Cues through id and "universal" cue selector. The more sophisticated selectors will be left for later, because they requier a bit more complex logic. Also narrowed a little bit the responsibilities of the WebvttCueParser to move some to the WebvttParser. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=119547731