Handle forwarding constructors of unnamed mixin applications for reflection

tests/lib/mirrors/unnamed_mixin_application_test.dart

Index: tests/lib/mirrors/unnamed_mixin_application_test.dart
diff --git a/tests/lib/mirrors/unnamed_mixin_application_test.dart b/tests/lib/mirrors/unnamed_mixin_application_test.dart
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--- /dev/null
+++ b/tests/lib/mirrors/unnamed_mixin_application_test.dart
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+// Copyright (c) 2016, 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 the forwarding constructors of unnamed mixin applications are 
+/// included for reflection.
+
+import 'dart:mirrors';
+
+class S {
+  S();
+  S.anUnusedName();
+}
+class M {}
+class C extends S with M {
+  C();
+}
+
+main() {
+  // Use 'C#', 'S+M#' and 'S#' but not 'S#anUnusedName' nor 'S+M#anUnusedName'.
+  new C();
+  // Disable tree shaking making 'S+M#anUnusedName' live.
+  reflectClass(C);
+}