unittest step 3 and 4: remove TestFramework.dart, make test.dart use

tests/isolate/src/APIv2_unresolvedPortsTest.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.
 
 // spawns multiple isolates and sends unresolved ports between them.
 #library('unresolved_ports');
-#import('dart:dom'); // import added so test.dart can treat this as a webtest.
 #import('dart:isolate');
 #import('../../../lib/unittest/unittest.dart');
-#import('../../../lib/unittest/dom_config.dart');
 
-// This is similar to APIv2_unresolvedPortsStandaloneTest but using
-// 'unittest.dart' so it can run to completion in browsers.
+// This test does the following:
+//  - main spawns two isolates: 'tim' and 'beth'
+//  - 'tim' spawns an isolate: 'bob'
+//  - main starts a message chain:
+//       main -> beth -> tim -> bob -> main
+//    by giving 'beth' a send-port to 'tim'.
 
 bethIsolate() {
   port.receive((msg, reply) => msg[1].send(
         '${msg[0]}\nBeth says: Tim are you coming? And Bob?', reply));
 }
 
 timIsolate() {
   SendPort bob = spawnFunction(bobIsolate);
   port.receive((msg, reply) => bob.send(
         '$msg\nTim says: Can you tell "main" that we are all coming?', reply));
 }
 
 bobIsolate() {
   port.receive((msg, reply) => reply.send(
         '$msg\nBob says: we are all coming!'));
 }
 
 main() {
-  useDomConfiguration();
-  asyncTest('Message chain with unresolved ports', 1, () {
+  test('Message chain with unresolved ports', () {
     ReceivePort port = new ReceivePort();
-    port.receive((msg, _) {
+    port.receive(expectAsync2((msg, _) {
       expect(msg).equals('main says: Beth, find out if Tim is coming.'
         + '\nBeth says: Tim are you coming? And Bob?'
         + '\nTim says: Can you tell "main" that we are all coming?'
         + '\nBob says: we are all coming!');
       port.close();
-      callbackDone();
-    });
+    }));
 
     SendPort tim = spawnFunction(timIsolate);
     SendPort beth = spawnFunction(bethIsolate);
 
     beth.send(
         // because tim is created asynchronously, here we are sending an
         // unresolved port:
         ['main says: Beth, find out if Tim is coming.', tim],
         port.toSendPort());
   });
 }