One more factory -> default pass.

dart/tests/language/src/InterfaceTest.dart

 // Copyright (c) 2011, 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.
 // Dart test program for testing params.
 
 interface Ai {
   int foo();
 }
 
-interface Bi extends Ai factory InterfaceTest {
+interface Bi extends Ai default InterfaceTest {
   Bi();
 }
 
 interface Simple extends Ai { }
 
 interface Aai { }
 
 interface Abi { }
 
 interface Bar { }
@@ skipping 14 matching lines @@
 
   static testMain() {
     var o = new Bi();
     Expect.equals(1, o.foo());
   }
 }
 
 main() {
   InterfaceTest.testMain();
 }