Tweak corelib/ConstListLiteralTest while we wait for a resolution of CL 9839101.

dart/frog/leg/lib/js_helper.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.
 
 #library('js_helper');
 
 #import('coreimpl.dart');
 
 #source('constant_map.dart');
 #source('regexp_helper.dart');
@@ skipping 1350 matching lines @@
 /**
  * Represents the type of Null. The compiler treats this specially.
  */
 class Null {
   factory Null() {
     throw new UnsupportedOperationException('new Null()');
   }
 }
 
 builtin$get$toString(receiver) => () => builtin$toString$0(receiver);
-
-builtin$copyFrom$4(receiver, arg1, arg2, arg3, arg4) {
-  // TODO(ahe): Remove this method when CL 9839101 has landed.
-  if (!isJsArray(receiver)) {
-    return UNINTERCEPTED(receiver.copyFrom(arg1, arg2, arg3, arg4));
-  }
-  throw new UnsupportedOperationException('copyFrom');
-}