| Index: tracing/tracing/ui/timeline_track_view.html | 
| diff --git a/tracing/tracing/ui/timeline_track_view.html b/tracing/tracing/ui/timeline_track_view.html | 
| index 8a7bd030f59a054b2d55db78e68b8b81b977d845..b796d2d69c59ae4fc0cd9db66afbef5a650b8718 100644 | 
| --- a/tracing/tracing/ui/timeline_track_view.html | 
| +++ b/tracing/tracing/ui/timeline_track_view.html | 
| @@ -109,6 +109,8 @@ Polymer({ | 
| this.viewport_.modelTrackContainer = this.modelTrackContainer_; | 
|  | 
| this.modelTrack_ = new tr.ui.tracks.ModelTrack(this.viewport_); | 
| +    if (!this.modelTrack_) | 
| +      console.log('modelTrack not created'); | 
| Polymer.dom(this.modelTrackContainer_).appendChild(this.modelTrack_); | 
|  | 
| this.timingTool_ = new tr.ui.b.TimingTool(this.viewport_, this); | 
|  |