| Index: tracing/tracing/ui/base/line_chart.html | 
| diff --git a/tracing/tracing/ui/base/line_chart.html b/tracing/tracing/ui/base/line_chart.html | 
| index ba43169524233dfc9874eae9ec9cfb99eda9a80f..4d4beb34f9bc2fbf367e6d2e51972eb3ac29cf50 100644 | 
| --- a/tracing/tracing/ui/base/line_chart.html | 
| +++ b/tracing/tracing/ui/base/line_chart.html | 
| @@ -25,7 +25,7 @@ tr.exportTo('tr.ui.b', function() { | 
|  | 
| decorate: function() { | 
| ChartBase2DBrushX.prototype.decorate.call(this); | 
| -      this.classList.add('line-chart'); | 
| +      Polymer.dom(this).classList.add('line-chart'); | 
| }, | 
|  | 
| isDatumFieldSeries_: function(fieldName) { | 
|  |