| Index: tracing/tracing/ui/tracks/letter_dot_track.html | 
| diff --git a/tracing/tracing/ui/tracks/letter_dot_track.html b/tracing/tracing/ui/tracks/letter_dot_track.html | 
| index 16a65d93eeaeb7a892fbd36707c24a544212b2ee..75ff6c86927c9978f3bd77ff2fb2008cd7724238 100644 | 
| --- a/tracing/tracing/ui/tracks/letter_dot_track.html | 
| +++ b/tracing/tracing/ui/tracks/letter_dot_track.html | 
| @@ -39,7 +39,7 @@ tr.exportTo('tr.ui.tracks', function() { | 
|  | 
| decorate: function(viewport) { | 
| tr.ui.tracks.Track.prototype.decorate.call(this, viewport); | 
| -      this.classList.add('letter-dot-track'); | 
| +      Polymer.dom(this).classList.add('letter-dot-track'); | 
| this.items_ = undefined; | 
|  | 
| this.heading_ = document.createElement('tr-ui-heading'); | 
|  |