Fix small bug in RecursiveVisitor

pkg/polymer_expressions/test/all_tests.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.
 
 library all_tests;
 
 import 'eval_test.dart' as eval;
 import 'parser_test.dart' as parser;
 import 'tokenizer_test.dart' as tokenizer;
+import 'visitor_test.dart' as visitor;
 
 main() {
+  eval.main();
+  parser.main();
   tokenizer.main();
-  parser.main();
-  eval.main();
+  visitor.main();
 }