dart2js: Add failing test for Function.apply on normal class with `call`.

tests/language/call_function_apply_test.dart

 // Copyright (c) 2015, 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.
 
 import "package:expect/expect.dart";
 
-int count = 0;
-
-void f([void f([x]) = f]) {
-  count++;
-  if (f != null) {
-    f(null);
+class A {
+  call({a: 42}) {
+    return 499 + a;
   }
 }
 
 main() {
-  f();
-  Expect.equals(2, count);
+  Expect.equals(497, Function.apply(new A(), [], {#a: -2}));
 }