Index: tracing/tracing/ui/tracks/multi_row_track.html |
diff --git a/tracing/tracing/ui/tracks/multi_row_track.html b/tracing/tracing/ui/tracks/multi_row_track.html |
index 04637ef2d2ae3dee30a63220237cbfb60e1281be..6abbb6b321973e4a1182b831a37372df0dfd7636 100644 |
--- a/tracing/tracing/ui/tracks/multi_row_track.html |
+++ b/tracing/tracing/ui/tracks/multi_row_track.html |
@@ -178,10 +178,10 @@ tr.exportTo('tr.ui.tracks', function() { |
}, |
updateHeadingAndTooltip_: function() { |
- if (!this.firstChild) |
+ if (!Polymer.dom(this).firstChild) |
return; |
- this.firstChild.heading = this.heading_; |
- this.firstChild.tooltip = this.tooltip_; |
+ Polymer.dom(this).firstChild.heading = this.heading_; |
+ Polymer.dom(this).firstChild.tooltip = this.tooltip_; |
}, |
/** |