Reapply change to hide VM-only List implementation classes.

lib/html/src/native_DOMImplementation.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _Utils {
   static List convertToList(List list) {
     // FIXME: [possible optimization]: do not copy the array if Dart_IsArray is fine w/ it.
     final length = list.length;
     List result = new List(length);
     result.setRange(0, length, list);
@@ skipping 23 matching lines @@
   static window() native "Utils_window";
   static print(String message) native "Utils_print";
   static SendPort spawnDomFunctionImpl(Function topLevelFunction) native "Utils_spawnDomFunction";
   static int _getNewIsolateId() native "Utils_getNewIsolateId";
 }
 
 class _NPObject extends NativeFieldWrapperClass1 {
   _NPObject();
   static _NPObject retrieve(String key) native "NPObject_retrieve";
   property(String propertyName) native "NPObject_property";
-  invoke(String methodName, [ObjectArray args = null]) native "NPObject_invoke";
+  invoke(String methodName, [List args = null]) native "NPObject_invoke";
 }
 
 class _DOMWindowCrossFrameImpl extends NativeFieldWrapperClass1 implements Window {
   _DOMWindowCrossFrameImpl();
 
   // Fields.
   History get history() native "DOMWindow_history_cross_frame_Getter";
   Location get location() native "DOMWindow_location_cross_frame_Getter";
   bool get closed() native "DOMWindow_closed_Getter";
   int get length() native "DOMWindow_length_Getter";
@@ skipping 50 matching lines @@
   bool isEmpty() => Maps.isEmpty(this);
 }
 
 get _printClosure => (s) {
   try {
     window.console.log(s);
   } on Dynamic catch(_) {
     _Utils.print(s);
   }
 };