| Index: tracing/tracing/ui/timeline_viewport.html | 
| diff --git a/tracing/tracing/ui/timeline_viewport.html b/tracing/tracing/ui/timeline_viewport.html | 
| index 0f5cf76b99309f63485b2b850e0c6cfa99379475..996ad8d7de070bc512d6bb04f2e4a069bc4d9413 100644 | 
| --- a/tracing/tracing/ui/timeline_viewport.html | 
| +++ b/tracing/tracing/ui/timeline_viewport.html | 
| @@ -157,7 +157,7 @@ tr.exportTo('tr.ui', function() { | 
| } | 
| if (this.iframe_) { | 
| this.iframe_.removeEventListener('resize', this.onResize_); | 
| -        this.parentEl_.removeChild(this.iframe_); | 
| +        Polymer.dom(this.parentEl_).removeChild(this.iframe_); | 
| } | 
| }, | 
|  | 
|  |