DevTools: Remove unused isAncestor parameter from findTreeElement in TreeOutline.

Source/devtools/front_end/elements/ElementsTreeOutline.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 286 matching lines @@
     {
         this._eventSupport.dispatchEventToListeners(WebInspector.ElementsTreeOutline.Events.ElementsTreeUpdated, nodes);
     },
 
     /**
      * @param {!WebInspector.DOMNode} node
      * @return {?TreeElement}
      */
     findTreeElement: function(node)
     {
-        function isAncestorNode(ancestor, node)
-        {
-            return ancestor.isAncestor(node);
-        }
-
         function parentNode(node)
         {
             return node.parentNode;
         }
 
-        var treeElement = TreeOutline.prototype.findTreeElement.call(this, node, isAncestorNode, parentNode);
+        var treeElement = TreeOutline.prototype.findTreeElement.call(this, node, parentNode);
         if (!treeElement && node.nodeType() === Node.TEXT_NODE) {
             // The text node might have been inlined if it was short, so try to find the parent element.
-            treeElement = TreeOutline.prototype.findTreeElement.call(this, node.parentNode, isAncestorNode, parentNode);
+            treeElement = TreeOutline.prototype.findTreeElement.call(this, node.parentNode, parentNode);
         }
 
         return treeElement;
     },
 
     /**
      * @param {!WebInspector.DOMNode} node
      * @return {?TreeElement}
      */
     createTreeElementFor: function(node)
@@ skipping 2350 matching lines @@
         var treeOutline = new WebInspector.ElementsTreeOutline(node.target(), false, false);
         treeOutline.rootDOMNode = node;
         treeOutline.element.classList.add("outline-disclosure");
         if (!treeOutline.children[0].hasChildren)
             treeOutline.element.classList.add("single-node");
         treeOutline.setVisible(true);
         treeOutline.element.treeElementForTest = treeOutline.children[0];
         return treeOutline.element;
     }
 }