function createRiskPercentiles(percentiles, times) {
      return percentiles.map((percentile, index) => {
        return {
          percentile,
          time: times[index],
        };
      });
    }
Create a riskPercentiles result object by matching the values in percentiles
and times.
@param {!Array<number>} percentiles
@param {!Array<number>} times
@return {!Array<{percentile: number, time: number}>}