Make isolate tests work on drt (and hopefully dartium).

tests/isolate/mint_maker_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 MintMakerTest;
 import 'dart:async';
 import 'dart:isolate';
-import '../../pkg/unittest/lib/unittest.dart';
+import 'package:unittest/unittest.dart';
+import "remote_unittest_helper.dart";
 
 class Mint {
   Map<SendPort, Purse> _registry;
   SendPort port;
 
   Mint() : _registry = new Map<SendPort, Purse>() {
     ReceivePort mintPort = new ReceivePort();
     port = mintPort.sendPort;
     serveMint(mintPort);
   }
@@ skipping 128 matching lines @@
     _port.send(reply.sendPort);
   }
 }
 
 _checkBalance(PurseWrapper wrapper, expected) {
   wrapper.queryBalance(expectAsync1((int balance) {
     expect(balance, equals(expected));
   }));
 }
 
-main() {
+void main([args, port]) {
+  if (testRemote(main, port)) return;
   test("creating purse, deposit, and query balance", () {
     MintMakerWrapper.create().then(expectAsync1((mintMaker) {
       mintMaker.makeMint(expectAsync1((MintWrapper mint) {
         mint.createPurse(100, expectAsync1((PurseWrapper purse) {
           _checkBalance(purse, 100);
           purse.sproutPurse(expectAsync1((PurseWrapper sprouted) {
             _checkBalance(sprouted, 0);
             _checkBalance(purse, 100);
 
             sprouted.deposit(purse, 5);
             _checkBalance(sprouted, 0 + 5);
             _checkBalance(purse, 100 - 5);
 
             sprouted.deposit(purse, 42);
             _checkBalance(sprouted, 0 + 5 + 42);
             _checkBalance(purse, 100 - 5 - 42);
           }));
         }));
       }));
     }));
   });
 }