handleC3_(dtvccPacket, controlCode) {
    // As of the CEA-708-E spec there are no commands on the C3 table, but if
    // seen, then the appropriate number of bytes must be skipped as per spec.
    if (controlCode >= 0x80 && controlCode <= 0x87) {
      dtvccPacket.skip(4);
    } else if (controlCode >= 0x88 && controlCode <= 0x8f) {
      dtvccPacket.skip(5);
    }
  }
Handles C3 group data.
@param {!shaka.cea.DtvccPacket} dtvccPacket
@param {number} controlCode
@private