Update language tests to new optional parameter syntax and semantics.

tests/language/named_parameters_passing_falsy_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 various values that might
 // be implemented as 'falsy' values in a JavaScript implementation.
 
 
 class TestClass {
   TestClass();
 
   method([value = 100]) => value;
+  method2({value: 100}) => value;
 
   static staticMethod([value = 200]) => value;
+  static staticMethod2({value: 200}) => value;
 }
 
 globalMethod([value = 300]) => value;
+globalMethod2({value: 300}) => value;
 
 const testValues = const [0, 0.0, '', false, null];
 
-testFunction(f) {
+testFunction(f, f2) {
   Expect.isTrue(f() >= 100);
   for (var v in testValues) {
     Expect.equals(v, f(v));
-    Expect.equals(v, f(value: v));
+    Expect.equals(v, f2(value: v));
   }
 }
 
 main() {
   var obj = new TestClass();
 
   Expect.equals(100, obj.method());
+  Expect.equals(100, obj.method2());
   Expect.equals(200, TestClass.staticMethod());
+  Expect.equals(200, TestClass.staticMethod2());
   Expect.equals(300, globalMethod());
+  Expect.equals(300, globalMethod2());
 
   for (var v in testValues) {
     Expect.equals(v, obj.method(v));
-    Expect.equals(v, obj.method(value: v));
+    Expect.equals(v, obj.method2(value: v));
     Expect.equals(v, TestClass.staticMethod(v));
-    Expect.equals(v, TestClass.staticMethod(value: v));
+    Expect.equals(v, TestClass.staticMethod2(value: v));
     Expect.equals(v, globalMethod(v));
-    Expect.equals(v, globalMethod(value: v));
+    Expect.equals(v, globalMethod2(value: v));
   }
 
   // Test via indirect call.
-  testFunction(obj.method);
-  testFunction(TestClass.staticMethod);
-  testFunction(globalMethod);
+  testFunction(obj.method, obj.method2);
+  testFunction(TestClass.staticMethod, TestClass.staticMethod2);
+  testFunction(globalMethod, globalMethod2);
 }