DevTools: Remove unused isAncestor parameter from findTreeElement in TreeOutline.

Source/devtools/front_end/elements/ElementsTreeOutline.js

Index: Source/devtools/front_end/elements/ElementsTreeOutline.js
diff --git a/Source/devtools/front_end/elements/ElementsTreeOutline.js b/Source/devtools/front_end/elements/ElementsTreeOutline.js
index 1e91339b01318cf04e1e654d1b2c20cfcc1a4617..38e66d51700fd8efb94e875ce4995882c454d056 100644
--- a/Source/devtools/front_end/elements/ElementsTreeOutline.js
+++ b/Source/devtools/front_end/elements/ElementsTreeOutline.js
@@ -304,20 +304,15 @@ WebInspector.ElementsTreeOutline.prototype = {
      */
     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;