Fix dartium build.

tests/lib/mirrors/mirrors_reader_test.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.
 
 // Test that everything reachable from a [MirrorSystem] can be accessed.
 
 library test.mirrors.reader;
 
 import 'dart:mirrors';
 import 'mirrors_reader.dart';
@@ skipping 26 matching lines @@
     }
     if (mirrorSystemType == '_LocalMirrorSystem') {
       // VM mirror system.
     } else if (mirrorSystemType == 'JsMirrorSystem') {
       // Dart2js runtime mirror system.
     }
     return false;
   }
 }
 
-void main(List<String> arguments) {
+void main([List<String> arguments = const <String>[]]) {

[Johnni Winther, 2014/02/07 11:11:02]

Dartium tests don't support required arguments.

   MirrorSystem mirrors = currentMirrorSystem();
   MirrorsReader reader = new RuntimeMirrorsReader(mirrors,
       verbose: arguments.contains('-v'),
       includeStackTrace: arguments.contains('-s'));
   reader.checkMirrorSystem(mirrors);
 }