Migrated test block 218 to Dart 2.0.

tests/lib_strong/mirrors/closurization_equivalence_test.dart

-// Copyright (c) 2015, 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.
-
-import 'dart:mirrors';
-import 'package:expect/expect.dart';
-
-topLevelMethod() {}
-
-class C {
-  static staticMethod() {}
-  instanceMethod() {}
-}
-
-main() {
-  LibraryMirror thisLibrary = reflectClass(C).owner;
-  Expect.equals(thisLibrary.declarations[#topLevelMethod],
-      (reflect(topLevelMethod) as ClosureMirror).function, "topLevel");
-
-  Expect.equals(reflectClass(C).declarations[#staticMethod],
-      (reflect(C.staticMethod) as ClosureMirror).function, "static");
-
-  Expect.equals(reflectClass(C).declarations[#instanceMethod],
-      (reflect(new C().instanceMethod) as ClosureMirror).function, "instance");
-}