Fix DOMImplementation.hasFeature()

components/script/dom/webidls/DOMImplementation.webidl

@@ -4,22 +4,24 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  * The origin of this IDL file is
- * https://dom.spec.whatwg.org/#interface-domimplementation
+ * https://dom.spec.whatwg.org/#interface=domimplementation
  *
  * Copyright:
  * To the extent possible under law, the editors have waived all copyright and
  * related or neighboring rights to this work.
  */
 
+// [Exposed=Window]
 interface DOMImplementation {
-  boolean hasFeature(DOMString feature,
-                     [TreatNullAs=EmptyString] DOMString version);
-  [Throws]
+  [NewObject, Throws]
   DocumentType createDocumentType(DOMString qualifiedName, DOMString publicId,
                                   DOMString systemId);
-  [Throws]
+  [NewObject, Throws]
   Document createDocument(DOMString? namespace,
                           [TreatNullAs=EmptyString] DOMString qualifiedName,
                           optional DocumentType? doctype = null);
+  [NewObject]
   Document createHTMLDocument(optional DOMString title);
+
+  boolean hasFeature(); // useless, always return true
 };