Handle metadata in the magic [^] property of class descriptions correctly.

tests/lib/mirrors/metadata_class_mirror_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.
 
-library test.runtime_type_test;
+// Regression test for http://dartbug.com/19173
 
-@MirrorsUsed(targets: 'test.runtime_type_test', override: '*')
 import 'dart:mirrors';
 
-import 'package:expect/expect.dart';
-
-class A {}
-
-class B {
-  get runtimeType => A;
+class A {
+    const A();
 }
 
+@deprecated
+const A anA = const A();
+
 main() {
-  Expect.equals(reflect(new B()).type, reflectClass(B));
+  ClassMirror typeMirror = reflectType(A);
+  var decs = typeMirror.declarations;
+  print(decs.length);
 }