Refactor code for fetching radio siblings

components/script/dom/nodelist.rs

@@ -81,3 +81,17 @@ impl Reflectable for NodeList {
         &self.reflector_
     }
 }
+
+pub trait NodeListHelpers {
+    fn into_vec(self) -> Vec<Temporary<Node>>;
+}
+
+
+impl<'a> NodeListHelpers for JSRef<'a, NodeList> {
+    fn into_vec(self) -> Vec<Temporary<Node>> {
+        match self.list_type {
+            Simple(ref elems) => elems.iter().map(|j| Temporary::new(*j)).collect(),
+            Children(ref node) => vec![Temporary::new(*node)]
+        }
+    }
+}