 }

      this.chartCtx_.stroke();

      this.chartCtx_.restore();


      // Labels.

      this.chartCtx_.save();

      this.chartCtx_.translate(CHART_PADDING_LEFT + Math.round(barWidth * 0.5),
          AXIS_PADDING_TOP + height + LABEL_PADDING);

      this.chartCtx_.font = '10px Arial';
      this.chartCtx_.textAlign = 'center';
      this.chartCtx_.textBaseline = 'top';

      let labelTickLeft;
      let labelTickBottom;
      for (let l = 0; l < len; l++) {
        labelTickLeft = Math.round(l * b