Enable mirrors for all the classes in the analyzer tests.

pkg/analyzer/test/reflective_tests.dart

 // Copyright (c) 2014, 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.
 
 library reflective_tests;
 
 import 'dart:async';
-
-@MirrorsUsed(metaTargets: 'ReflectiveTestCase')
 import 'dart:mirrors';
 
 import 'package:unittest/unittest.dart';
 
 
 /**
  * A marker annotation used to instruct dart2js to keep reflection information
  * for the annotated classes.
  */
 class ReflectiveTestCase {
@@ skipping 60 matching lines @@
   try {
     invocationResult = instanceMirror.invoke(symbol, []).reflectee;
   } on NoSuchMethodError catch (e) {
   }
   if (invocationResult is Future) {
     return invocationResult;
   } else {
     return new Future.value(invocationResult);
   }
 }