Fixed tests so they do indeed confirm that values on optional named parameters are not allowed. Add…

tests/language/named_parameters8_negative_test.dart

Index: tests/language/named_parameters8_negative_test.dart
diff --git a/tests/language/named_parameters8_negative_test.dart b/tests/language/named_parameters8_negative_test.dart
deleted file mode 100644
index 3cea5fcc0b5764a68c43c61968ba9a394aa83c8f..0000000000000000000000000000000000000000
--- a/tests/language/named_parameters8_negative_test.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2011, 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.
-// Dart test program for testing named parameters.
-
-
-class C {
-  var _handler = null;
-
-  // Expect a compile-time error below:
-  // No default values allowed in closure type.
-  void InstallCallback(void cb([String msg = null])) {
-    _handler = cb;
-  }
-}
-
-
-main() {
-  Expect.equals(true, false);
-}