static from3ArgsTextTrackCue_(startTime, endTime, text) {
    return new window.TextTrackCue(startTime, endTime, text);
  }
Draft spec TextTrackCue with 3 constructor arguments.
@see {@link https://bit.ly/2IdyKbA W3C Working Draft 25 October 2012}.

@param {number} startTime
@param {number} endTime
@param {string} text
@return {!TextTrackCue}
@private