Fix and reenable dart2js extra tests and dart2js native tests.

tests/compiler/dart2js_extra/argument_definition_test.dart

 // Copyright (c) 2012, 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 parsing and resolution of argument definition test.
 
-int test(int a, [int b = 2, int c = 3]) {
+int test(int a, {int b: 2, int c: 3}) {
   int result = 0;
   print(?b);
   print(?result);  /// 01: compile-time error
   print(?a);
   print(?b);
   print(?c);
   {
     var b;
     ?b;  /// 02: compile-time error
   }
   print((!?a?!?b:!?c) == (?a??b:?c));
   print(!?a?!?b:!?c == ?a??b:?c);
 }
 
-closure_test(int a, [int b = 2, int c = 3]) {
+closure_test(int a, {int b: 2, int c: 3}) {
   var x = 0;
   return () {
     int result = 0;
     print(?b);
     print(?result);  /// 03: compile-time error
     print(?x);  /// 04: compile-time error
     print(?a);
     print(?b);
     print(?c);
     {
       var b;
       ?b;  /// 05: compile-time error
     }
     print((!?a?!?b:!?c) == (?a??b:?c));
     print(!?a?!?b:!?c == ?a??b:?c);
   };
 }
 
 main() {
   test(1);
-  test(1, 2);
-  test(1, 2, 3);
-  test(1, c:3);
+  test(1, b: 2);
+  test(1, b: 2, c: 3);
+  test(1, c: 3);
 
   closure_test(1)();
-  closure_test(1, 2)();
-  closure_test(1, 2, 3)();
-  closure_test(1, c:3)();
+  closure_test(1, b: 2)();
+  closure_test(1, b: 2, c: 3)();
+  closure_test(1, c: 3)();
 }