Move function serialization to sync ports.

tests/html/js_interop_func_passing_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
 
-#library('JsInterop2Test');
+#library('JsInteropFuncPassingTest');
 #import('../../lib/unittest/unittest.dart');
 #import('../../lib/unittest/html_config.dart');
 #import('dart:html');
 #import('dart:isolate');
 
 injectSource(code) {
   final script = new ScriptElement();
   script.type = 'text/javascript';
   script.innerHTML = code;
   document.body.nodes.add(script);
 }
 
 var isolateTest = """
-  function test(data) {
-    if (data == 'sent')
-      return 'received';
-  }
-
   var port = new ReceivePortSync();
-  port.receive(test);
+  port.receive(function (f) {
+    return f('fromJS');
+  });
   window.registerPort('test', port.toSendPort());
 """;
 
 main() {
   useHtmlConfiguration();
 
-  test('dart-to-js-ports', () {
+  test('dart-to-js-function', () {
     injectSource(isolateTest);
 
     SendPortSync port = window.lookupPort('test');
-    var result = port.callSync('sent');
+    var result = port.callSync((msg) {
+      Expect.equals('fromJS', msg);
+      return 'received';
+    });
     Expect.equals('received', result);
-
-    result = port.callSync('ignore');
-    Expect.isNull(result);
   });
 }