Migrate block 114 (and some of 113).

tests/language_strong/generic_methods_closure_test.dart

-// Copyright (c) 2017, 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.
-
-// Test that a generic closure is correctly constructed.
-
-library generic_methods_closure_test;
-
-import "package:expect/expect.dart";
-
-class A {}
-
-class I<T> {}
-
-class B extends I<B> {}
-
-void fun<T>(List<T> list) {
-  var helper1 = <S>(List<S> list) {
-    if (list.length > 0) {
-      Expect.isTrue(list[0] is S);
-    }
-    Expect.isTrue(list is List<S>);
-    Expect.isTrue(list is List<T>);
-  };
-
-  void helper2<S>(List<S> list) {
-    if (list.length > 0) {
-      Expect.isTrue(list[0] is S);
-    }
-    Expect.isTrue(list is List<S>);
-    Expect.isTrue(list is List<T>);
-  }
-
-  helper1<T>(list);
-  helper2<T>(list);
-}
-
-main() {
-  List<B> list = <B>[new B()];
-  fun<B>(list);
-}