| Index: tracing/tracing/ui/analysis/frame_power_usage_chart.html | 
| diff --git a/tracing/tracing/ui/analysis/frame_power_usage_chart.html b/tracing/tracing/ui/analysis/frame_power_usage_chart.html | 
| index 840cf8a5c972186b45e603ac90eb6d1a8d9bbe34..9177a60a37d6a841db9659197d11ca2bb6a15c60 100644 | 
| --- a/tracing/tracing/ui/analysis/frame_power_usage_chart.html | 
| +++ b/tracing/tracing/ui/analysis/frame_power_usage_chart.html | 
| @@ -88,8 +88,8 @@ Polymer({ | 
|  | 
| clearChart_: function() { | 
| var content = this.$.content; | 
| -    while (content.firstChild) | 
| -      content.removeChild(content.firstChild); | 
| +    while (Polymer.dom(content).firstChild) | 
| +      Polymer.dom(content).removeChild(Polymer.dom(content).firstChild); | 
|  | 
| this.chart_ = undefined; | 
| }, | 
|  |