Update language tests to new optional parameter syntax and semantics.

tests/language/named_parameters_passing_false_test.dart

 // 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 with 'false' passed as an
 // argument.
 
 
 class TestClass {
   TestClass();
 
   bool method([bool value]) => value;
+  bool method2({bool value}) => value;
 
   static bool staticMethod([bool value]) => value;
+  static bool staticMethod2({bool value}) => value;
 }
 
 bool globalMethod([bool value]) => value;
+bool globalMethod2({bool value}) => value;
 
 
 main() {
   var obj = new TestClass();
 
   Expect.equals(null, obj.method());
+  Expect.equals(null, obj.method2());
   Expect.equals(true, obj.method(true));
-  Expect.equals(true, obj.method(value: true));
+  Expect.equals(true, obj.method2(value: true));
   Expect.equals(false, obj.method(false));
-  Expect.equals(false, obj.method(value: false));
+  Expect.equals(false, obj.method2(value: false));
 
   Expect.equals(null, TestClass.staticMethod());
+  Expect.equals(null, TestClass.staticMethod2());
   Expect.equals(true, TestClass.staticMethod(true));
-  Expect.equals(true, TestClass.staticMethod(value: true));
+  Expect.equals(true, TestClass.staticMethod2(value: true));
   Expect.equals(false, TestClass.staticMethod(false));
-  Expect.equals(false, TestClass.staticMethod(value: false));
+  Expect.equals(false, TestClass.staticMethod2(value: false));
 
   Expect.equals(null, globalMethod());
+  Expect.equals(null, globalMethod2());
   Expect.equals(true, globalMethod(true));
-  Expect.equals(true, globalMethod(value: true));
+  Expect.equals(true, globalMethod2(value: true));
   Expect.equals(false, globalMethod(false));
-  Expect.equals(false, globalMethod(value: false));
+  Expect.equals(false, globalMethod2(value: false));
 }