Updated reflect_dom_object to be passed by value

components/script/dom/treewalker.rs

@@ -49,7 +49,7 @@ impl TreeWalker {
                            filter: Filter) -> Temporary<TreeWalker> {
         let window = document.window().root();
         reflect_dom_object(box TreeWalker::new_inherited(root_node, what_to_show, filter),
-                           &Window(*window),
+                           Window(*window),
                            TreeWalkerBinding::Wrap)
     }