Merge 89562 - 2011-06-23 Mikhail Naganov <mnaganov@chromium.org>

Source/WebCore/inspector/front-end/DetailedHeapshotView.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 894 matching lines @@
             this.retainmentDataGrid.reset();
     },
 
     _mouseClickInRetainmentGrid: function(event)
     {
         var cell = event.target.enclosingNodeOrSelfWithNodeName("td");
         if (!cell || (!cell.hasStyleClass("path-column")))
             return;
         var row = event.target.enclosingNodeOrSelfWithNodeName("tr");
         var nodeItem = row._dataGridNode;
-        if (!nodeItem)
+        if (!nodeItem || !nodeItem.route)
             return;
         function expandRoute()
         {
             this.dataGrid.expandRoute(nodeItem.route);
         }
         this.changeView("Containment", expandRoute.bind(this));
     },
 
     changeView: function(viewTitle, callback)
     {
@@ skipping 279 matching lines @@
         return new WebInspector.ProfileSidebarTreeElement(profile, WebInspector.UIString("Snapshot %d"), "heap-snapshot-sidebar-tree-item");
     },
 
     createView: function(profile)
     {
         return new WebInspector.DetailedHeapshotView(WebInspector.panels.profiles, profile);
     }
 }
 
 WebInspector.DetailedHeapshotProfileType.prototype.__proto__ = WebInspector.ProfileType.prototype;