Ensure constructorName symbols include private manglings.

tests/lib/mirrors/repeated_private_anon_mixin_app_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.
+
+library test.repeated_private_anon_mixin_app;
+
+// Regression test for symbol mangling.
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+import 'repeated_private_anon_mixin_app1.dart' as lib1;
+import 'repeated_private_anon_mixin_app2.dart' as lib2;
+
+testMA() {
+  Symbol name1 = reflectClass(lib1.MA).superclass.simpleName;
+  Symbol name2 = reflectClass(lib2.MA).superclass.simpleName;
+
+  Expect.equals('lib._S with lib._M', MirrorSystem.getName(name1));
+  Expect.equals('lib._S with lib._M', MirrorSystem.getName(name2));
+
+  Expect.notEquals(name1, name2);
+  Expect.notEquals(name2, name1);
+}
+
+testMA2() {
+  Symbol name1 = reflectClass(lib1.MA2).superclass.simpleName;
+  Symbol name2 = reflectClass(lib2.MA2).superclass.simpleName;
+
+  Expect.equals('lib._S with lib._M, lib._M2', MirrorSystem.getName(name1));
+  Expect.equals('lib._S with lib._M, lib._M2', MirrorSystem.getName(name2));
+
+  Expect.notEquals(name1, name2);
+  Expect.notEquals(name2, name1);
+}
+
+main() {
+  testMA();
+  testMA2();
+}