Update language tests to new optional parameter syntax and semantics.

tests/language/named_parameters_passing_null_test.dart

Index: tests/language/named_parameters_passing_null_test.dart
===================================================================
--- tests/language/named_parameters_passing_null_test.dart	(revision 12414)
+++ tests/language/named_parameters_passing_null_test.dart	(working copy)
@@ -10,31 +10,37 @@
   TestClass();
 
   num method([value = 100]) => value;
+  num method2({value: 100}) => value;
 
   static num staticMethod([value = 200]) => value;
+  static num staticMethod2({value: 200}) => value;
 }
 
 num globalMethod([value = 300]) => value;
+num globalMethod2({value: 300}) => value;
 
 
 main() {
   var obj = new TestClass();
 
   Expect.equals(100, obj.method());
+  Expect.equals(100, obj.method2());
   Expect.equals(50, obj.method(50));
-  Expect.equals(50, obj.method(value: 50));
+  Expect.equals(50, obj.method2(value: 50));
   Expect.equals(null, obj.method(null));
-  Expect.equals(null, obj.method(value: null));
+  Expect.equals(null, obj.method2(value: null));
 
   Expect.equals(200, TestClass.staticMethod());
+  Expect.equals(200, TestClass.staticMethod2());
   Expect.equals(50, TestClass.staticMethod(50));
-  Expect.equals(50, TestClass.staticMethod(value: 50));
+  Expect.equals(50, TestClass.staticMethod2(value: 50));
   Expect.equals(null, TestClass.staticMethod(null));
-  Expect.equals(null, TestClass.staticMethod(value: null));
+  Expect.equals(null, TestClass.staticMethod2(value: null));
 
   Expect.equals(300, globalMethod());
+  Expect.equals(300, globalMethod2());
   Expect.equals(50, globalMethod(50));
-  Expect.equals(50, globalMethod(value: 50));
+  Expect.equals(50, globalMethod2(value: 50));
   Expect.equals(null, globalMethod(null));
-  Expect.equals(null, globalMethod(value: null));
+  Expect.equals(null, globalMethod2(value: null));
 }