DevTools: Get rid of representedObject usages in ElementsTreeOutline.

Source/devtools/front_end/elements/ElementsPanel.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 503 matching lines @@
     },
 
     /**
      * @param {!Element} anchor
      * @param {!WebInspector.Popover} popover
      */
     _showPopover: function(anchor, popover)
     {
         var listItem = anchor.enclosingNodeOrSelfWithNodeName("li");
         // We get here for CSS properties, too.
-        if (listItem && listItem.treeElement && listItem.treeElement.treeOutline instanceof WebInspector.ElementsTreeOutline) {
-            var node = /** @type {!WebInspector.DOMNode} */ (listItem.treeElement.representedObject);
+        if (listItem && listItem.treeElement && listItem.treeElement instanceof WebInspector.ElementsTreeElement) {
+            var elementsTreeElement = /** @type {!WebInspector.ElementsTreeElement} */ (listItem.treeElement);
+            var node = elementsTreeElement.node();
             this._loadDimensionsForNode(node, WebInspector.DOMPresentationUtils.buildImagePreviewContents.bind(WebInspector.DOMPresentationUtils, node.target(), anchor.href, true, showPopover));
         } else {
             var node = this.selectedDOMNode();
             if (node)
                 WebInspector.DOMPresentationUtils.buildImagePreviewContents(node.target(), anchor.href, true, showPopover);
         }
 
         /**
          * @param {!Element=} contents
          */
@@ skipping 563 matching lines @@
 
 WebInspector.ElementsPanelFactory.prototype = {
     /**
      * @return {!WebInspector.Panel}
      */
     createPanel: function()
     {
         return WebInspector.ElementsPanel.instance();
     }
 }