1 files changed, 2 insertions, 2 deletions
diff --git a/chromium/third_party/catapult/tracing/tracing/ui/tracks/ruler_track_test.html b/chromium/third_party/catapult/tracing/tracing/ui/tracks/ruler_track_test.html
index 3ca0d72fdf4..bde5c5c916f 100644
--- a/chromium/third_party/catapult/tracing/tracing/ui/tracks/ruler_track_test.html
+++ b/chromium/third_party/catapult/tracing/tracing/ui/tracks/ruler_track_test.html
@@ -19,10 +19,10 @@ tr.b.unittest.testSuite(function() {
 
     var viewport = new tr.ui.TimelineViewport(div);
     var drawingContainer = new tr.ui.tracks.DrawingContainer(viewport);
-    div.appendChild(drawingContainer);
+    Polymer.dom(div).appendChild(drawingContainer);
 
     var track = tr.ui.tracks.RulerTrack(viewport);
-    drawingContainer.appendChild(track);
+    Polymer.dom(drawingContainer).appendChild(track);
     this.addHTMLOutput(div);
 
     drawingContainer.invalidate();