| Index: tracing/tracing/ui/extras/chrome/cc/picture_ops_chart_summary_view.html | 
| diff --git a/tracing/tracing/ui/extras/chrome/cc/picture_ops_chart_summary_view.html b/tracing/tracing/ui/extras/chrome/cc/picture_ops_chart_summary_view.html | 
| index d9db1966e6b7a5be0a2a1b82270af28764892526..c9d60769fdc9b9afe24ab1a023ad973f15919a67 100644 | 
| --- a/tracing/tracing/ui/extras/chrome/cc/picture_ops_chart_summary_view.html | 
| +++ b/tracing/tracing/ui/extras/chrome/cc/picture_ops_chart_summary_view.html | 
| @@ -78,7 +78,7 @@ tr.exportTo('tr.ui.e.chrome.cc', function() { | 
| this.picture_ = picture; | 
| this.pictureDataProcessed_ = false; | 
|  | 
| -      if (this.classList.contains('hidden')) | 
| +      if (Polymer.dom(this).classList.contains('hidden')) | 
| return; | 
|  | 
| this.processPictureData_(); | 
| @@ -87,12 +87,12 @@ tr.exportTo('tr.ui.e.chrome.cc', function() { | 
| }, | 
|  | 
| hide: function() { | 
| -      this.classList.add('hidden'); | 
| +      Polymer.dom(this).classList.add('hidden'); | 
| }, | 
|  | 
| show: function() { | 
|  | 
| -      this.classList.remove('hidden'); | 
| +      Polymer.dom(this).classList.remove('hidden'); | 
|  | 
| if (this.pictureDataProcessed_) | 
| return; | 
|  |