docs: function ThreadTimeSlice(thread, schedulingState, cat,
                             start, args, opt_duration) {
      Slice.call(this, cat, schedulingState,
                 this.getColorForState_(schedulingState),
          start, args, opt_duration);
      this.thread = thread;
      this.schedulingState = schedulingState;
      this.cpuOnWhichThreadWasRunning = undefined;
    }