Remove get_* on getters as per RFC 0344.

https://github.com/rust-lang/rfcs/blob/master/text/0344-conventions-galore.md#gettersetter-apis

https://github.com/servo/servo/issues/6224

components/script/dom/htmlformelement.rs

@@ -400,7 +400,7 @@ impl HTMLFormElement {
         for child in node.traverse_preorder() {
             // Step 3.1: The field element is disabled.
             match child.downcast::<Element>() {
-                Some(el) if !el.get_disabled_state() => (),
+                Some(el) if !el.disabled_state() => (),
                 _ => continue,
             }