DevTools: Remove unused isAncestor parameter from findTreeElement in TreeOutline.

Source/devtools/front_end/ui/treeoutline.js

Index: Source/devtools/front_end/ui/treeoutline.js
diff --git a/Source/devtools/front_end/ui/treeoutline.js b/Source/devtools/front_end/ui/treeoutline.js
index a9e1efa133e60fb5a348994faf1539bf1fea439b..e973d67c1d7ccf688ac707400004615382caf173 100644
--- a/Source/devtools/front_end/ui/treeoutline.js
+++ b/Source/devtools/front_end/ui/treeoutline.js
@@ -283,11 +283,10 @@ TreeOutline.prototype.getCachedTreeElement = function(representedObject)
 
 /**
  * @param {?Object} representedObject
- * @param {function(!Object, !Object):boolean} isAncestor
  * @param {function(!Object):?Object} getParent
  * @return {?TreeElement}
  */
-TreeOutline.prototype.findTreeElement = function(representedObject, isAncestor, getParent)
+TreeOutline.prototype.findTreeElement = function(representedObject, getParent)
 {
     if (!representedObject)
         return null;