| Index: tracing/tracing/ui/base/mouse_mode_icon.html | 
| diff --git a/tracing/tracing/ui/base/mouse_mode_icon.html b/tracing/tracing/ui/base/mouse_mode_icon.html | 
| index f08bb655437b5b6c39922d190a88e4c5babd2df8..3cf38ac9dee4e921090b6462940ccade39aa91b7 100644 | 
| --- a/tracing/tracing/ui/base/mouse_mode_icon.html | 
| +++ b/tracing/tracing/ui/base/mouse_mode_icon.html | 
| @@ -73,9 +73,9 @@ Polymer({ | 
| set active(active) { | 
| this.active_ = !!active; | 
| if (this.active_) | 
| -      this.classList.add('active'); | 
| +      Polymer.dom(this).classList.add('active'); | 
| else | 
| -      this.classList.remove('active'); | 
| +      Polymer.dom(this).classList.remove('active'); | 
| this.updateContents_(); | 
| }, | 
|  | 
|  |