| Index: tracing/tracing/ui/tracks/chart_track.html | 
| diff --git a/tracing/tracing/ui/tracks/chart_track.html b/tracing/tracing/ui/tracks/chart_track.html | 
| index f66728a65334913a555b41995d82e86572fad25b..f736a5bfd135639650c4da4309a5537ad61942c3 100644 | 
| --- a/tracing/tracing/ui/tracks/chart_track.html | 
| +++ b/tracing/tracing/ui/tracks/chart_track.html | 
| @@ -36,7 +36,7 @@ tr.exportTo('tr.ui.tracks', function() { | 
|  | 
| decorate: function(viewport) { | 
| tr.ui.tracks.Track.prototype.decorate.call(this, viewport); | 
| -      this.classList.add('chart-track'); | 
| +      Polymer.dom(this).classList.add('chart-track'); | 
| this.series_ = undefined; | 
|  | 
| // GUID -> {axis: ChartAxis, series: [ChartSeries]}. | 
|  |