test rename overhaul: step 8 - language tests

tests/language/src/DefaultFactory3Test.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.
-
-// Check possibly still unresolved upper bounds of default factory class.
-
-
-interface A<T extends Foo> default _AImpl<T extends Foo> {
-  const A();
-}
-
-class Moo extends Foo {}
-
-class Foo extends Bar {}
-
-class Bar {}
-
-class _AImpl<T extends Foo> implements A<T> {
-   factory _AImpl(){}
-}
-
-main() {
-  var result = new A<Moo>();
-}