Revert of Convert chart-json to Histograms.

tracing/tracing/ui/base/box_chart.html

Index: tracing/tracing/ui/base/box_chart.html
diff --git a/tracing/tracing/ui/base/box_chart.html b/tracing/tracing/ui/base/box_chart.html
index dd689f3ab68f35269964a18d965cbc59e683f08f..77f2334d0a5b3a1b65caed6dbcf9d44cb2ee92b1 100644
--- a/tracing/tracing/ui/base/box_chart.html
+++ b/tracing/tracing/ui/base/box_chart.html
@@ -43,36 +43,6 @@
 
     get xAxisTickOffset() {
       return 0.5;
-    },
-
-    updateDataRange_: function() {
-      if (this.overrideDataRange_ !== undefined) {
-        return;
-      }
-
-      this.autoDataRange_.reset();
-      for (var datum of this.data_) {
-        this.autoDataRange_.addValue(datum.percentile_0);
-        this.autoDataRange_.addValue(datum.percentile_100);
-      }
-    },
-
-    updateXAxis_: function(xAxis) {
-      xAxis.selectAll('*').remove();
-      if (this.hideXAxis) {
-        return;
-      }
-
-      tr.ui.b.NameColumnChart.prototype.updateXAxis_.call(this, xAxis);
-
-      var baseline = xAxis.selectAll('path').data([this]);
-      baseline.enter().append('line')
-        .attr('stroke', 'black')
-        .attr('x1', this.xScale_(0))
-        .attr('x2', this.xScale_(this.data_.length))
-        .attr('y1', this.chartAreaSize.height)
-        .attr('y2', this.chartAreaSize.height);
-      baseline.exit().remove();
     },
 
     updateDataContents_: function(dataSel) {