Remove the reply port form the native isolate handler

samples/sample_extension/sample_asynchronous_extension.dart

Index: samples/sample_extension/sample_asynchronous_extension.dart
diff --git a/samples/sample_extension/sample_asynchronous_extension.dart b/samples/sample_extension/sample_asynchronous_extension.dart
index 3459b440aa997ca6642a1b52f021ae6e5da04402..389703f8ced8b2758cfe55979e3f2f9573b93d57 100644
--- a/samples/sample_extension/sample_asynchronous_extension.dart
+++ b/samples/sample_extension/sample_asynchronous_extension.dart
@@ -13,16 +13,22 @@ class RandomArray {
   static SendPort _port;
 
   Future<List<int> > randomArray(int seed, int length) {
-    var args = new List(2);
+    var completer = new Completer();
+    var replyPort = new ReceivePort();

[floitsch, 2013/10/25 18:04:58]

This will need to be merged to new RawReceivePort()

[Søren Gjesse, 2013/10/29 07:42:57]

Done.

+    var args = new List(3);
     args[0] = seed;
     args[1] = length;
-    return _servicePort.call(args).then((result) {
+    args[2] = replyPort.toSendPort();
+    _servicePort.send(args);
+    replyPort.receive((result, _) {
+      replyPort.close();
       if (result != null) {
-        return result;
+        completer.complete(result);
       } else {
-        throw new Exception("Random array creation failed");
+        completer.completeError(new Exception("Random array creation failed"));
       }
     });
+    return completer.future;
   }
 
   SendPort get _servicePort {