Added back helper file accidentally deleted during test block 219 migration.

tests/lib_2/mirrors/equality_test.dart

 // Copyright (c) 2013, 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.
 
 // This tests uses the multi-test "ok" feature:
 // none: Trimmed behaviour. Passing on the VM.
 // 01: Trimmed version for dart2js.
 // 02: Full version passing in the VM.
 //
 // TODO(rmacnak,ahe): Remove multi-test when VM and dart2js are on par.
@@ skipping 139 matching lines @@
     {'currentMirrorSystem().isolate': currentMirrorSystem().isolate},
     {
       'thisLibrary': thisLibrary,
       'reflectClass(A).owner': reflectClass(A).owner,
       'reflectClass(B).owner': reflectClass(B).owner,
       'reflect(new A()).type.owner': reflect(new A()).type.owner,
       'reflect(new B()).type.owner': reflect(new B()).type.owner
     },
   ]);
 }