Implemented more of the Isolate API

tests/isolate/handle_error2_test.dart

 // Copyright (c) 2014, 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 handle_error_test;
 
 import "dart:isolate";
 import "dart:async";
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
@@ skipping 29 matching lines @@
     Future result = reply.first.then((sendPort) {
       return [isolate, sendPort];
     });
     return result;
   });
 }
 
 main(){
   asyncStart();
   RawReceivePort reply = new RawReceivePort(null);
-  RawReceivePort reply2 = new RawReceivePort(null);
   // Create two isolates waiting for commands, with errors non-fatal.
   Future iso1 = spawn(isomain1);
   Future iso2 = spawn(isomain1);
   Future.wait([iso1, iso2]).then((l) {
     var isolate1 = l[0][0];
     var sendPort1 = l[0][1];
     var isolate2 = l[1][0];
     var sendPort2 = l[1][1];
     Stream errors = isolate1.errors;  // Broadcast stream, never a done message.
     int state = 1;
@@ skipping 19 matching lines @@
     sendPort2.send(0);
     sendPort1.send(1);
     sendPort2.send(1);
     sendPort1.send(2);
     sendPort2.send(2);
     sendPort1.send(3);
     sendPort2.send(3);
   });
 }