Fix invocation of closures via .call in the VM

tests/language/call_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.
+// VMOptions=--optimization_counter_threshold=10
 
 import "package:expect/expect.dart";
 
 main() {
   bar(a) {
     return a is String;
   }
-  Expect.isFalse(bar(1));
-  Expect.isTrue(bar.call('foo'));
+
+  for (var i = 0; i < 20; i++) {
+    Expect.isFalse(bar(1));
+    Expect.isTrue(bar.call('foo'));
+  }
+
+  opt_arg([a = "a"]) => a is String;
+
+  for (var i = 0; i < 20; i++) {
+    Expect.isFalse(opt_arg(1));
+    Expect.isFalse(opt_arg.call(1));
+    Expect.isTrue(opt_arg());
+    Expect.isTrue(opt_arg.call());
+    Expect.isTrue(opt_arg("b"));
+    Expect.isTrue(opt_arg.call("b"));
+  }
+
+  named_arg({x: 11, y: 22}) => "$x$y";
+
+  for (var i = 0; i < 20; i++) {
+    Expect.equals("1122", named_arg());
+    Expect.equals("1122", named_arg.call());
+    Expect.equals("4455", named_arg(y:55, x:44));
+    Expect.equals("4455", named_arg.call(y:55, x:44));
+    Expect.equals("4455", named_arg(x:44, y:55));
+    Expect.equals("4455", named_arg.call(x:44, y:55));
+  }
+
+  Expect.throws(() => bar.call(), (e) => e is NoSuchMethodError);
+  Expect.throws(() => opt_arg.call({x:"p"}), (e) => e is NoSuchMethodError);
+  Expect.throws(() => named_arg.call("p", "q"), (e) => e is NoSuchMethodError);
 }