ICKS - 1);
      let tickVal = 0;

      this.chartCtx_.fillStyle = '#333';
      this.chartCtx_.strokeStyle = '#777';
      this.chartCtx_.save();

      // Translate half a pixel to avoid blurry lines.
      this.chartCtx_.translate(0.5, 0.5);

      // Sides.

      this.chartCtx_.save();

      this.chartCtx_.translate(AXIS_PADDING_LEFT, AXIS_PADDING_TOP);
      this.chartCtx_.moveTo(0, 0);
      this.chartCtx_.lineTo(0, height);
      this.chartCtx_.lineTo(width, height);

      // Y-axis ticks.
      