| Index: tracing/tracing/ui/tracks/async_slice_group_track.html | 
| diff --git a/tracing/tracing/ui/tracks/async_slice_group_track.html b/tracing/tracing/ui/tracks/async_slice_group_track.html | 
| index 3f991eda01762c4a01d2308e7ef07db8e12b9275..d67142780974feb6240dabc4493d6eb1d92168bc 100644 | 
| --- a/tracing/tracing/ui/tracks/async_slice_group_track.html | 
| +++ b/tracing/tracing/ui/tracks/async_slice_group_track.html | 
| @@ -28,7 +28,7 @@ tr.exportTo('tr.ui.tracks', function() { | 
|  | 
| decorate: function(viewport) { | 
| tr.ui.tracks.MultiRowTrack.prototype.decorate.call(this, viewport); | 
| -      this.classList.add('async-slice-group-track'); | 
| +      Polymer.dom(this).classList.add('async-slice-group-track'); | 
| this.group_ = undefined; | 
| }, | 
|  | 
|  |