Index: tracing/tracing/ui/tracks/drawing_container.html |
diff --git a/tracing/tracing/ui/tracks/drawing_container.html b/tracing/tracing/ui/tracks/drawing_container.html |
index c6e64cdb102e41864b50c0482d4c1f625806e3af..7fc1653e565333e0339e3ead92194e4e45cda292 100644 |
--- a/tracing/tracing/ui/tracks/drawing_container.html |
+++ b/tracing/tracing/ui/tracks/drawing_container.html |
@@ -35,7 +35,7 @@ tr.exportTo('tr.ui.tracks', function() { |
decorate: function(viewport) { |
tr.ui.tracks.Track.prototype.decorate.call(this, viewport); |
- this.classList.add('drawing-container'); |
+ Polymer.dom(this).classList.add('drawing-container'); |
this.canvas_ = document.createElement('canvas'); |
this.canvas_.className = 'drawing-container-canvas'; |