 [this.currentMetricName_]};

      if (this.currentMetricTypeInfo_ &&
          this.currentMetricTypeInfo_.metadata.supportsRangeOfInterest &&
          this.rangeOfInterest &&
          !this.rangeOfInterest.isEmpty) {
        options.rangeOfInterest = this.rangeOfInterest;
      }

      const startDate = new Date();
      const addFailureCb = failure => {
        Polymer.dom(this.$.error).textContent = failure.description;
      };
      const histograms = tr.metrics.runMetrics(
          this.model_, 