SendPort + ReceivePort changes:

samples/proxy/proxy.dart

 // Copyright (c) 2011, 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("proxy");
 #import("dart:isolate");
 
 /**
  * Base class for all RpcProxy's
  *
@@ skipping 17 matching lines @@
     *      isolate).
     *
     * returns:
     *   a Future object that will be set to the value that was
     *     received as a reply to the SendPort call.
     */
   Future sendCommand(String command, List args, adjustReply(Object value)) {
     Completer completer = new Completer();
     futurePort.then((SendPort port) {
         args = _filterArgs(args);
-        port.call({"command" : command, "args" : args}).receive(
-            (value, ignoreReplyTo) {
-          assert(ignoreReplyTo === null);
+        port.call({"command" : command, "args" : args}).then((value) {
           value = _filterException(value);
           if (adjustReply != null) {
             // give derived proxy class a chance to transate SendPort to
             // RpcProxy
             value = adjustReply(value);
           }
           if (value is Exception) {
             completer.completeException(value);
           } else {
             completer.complete(value);
@@ skipping 180 matching lines @@
     if (object === null || !(object is String)) {
       return null;
     }
     String s = object;
     if (!s.startsWith(prefix)) {
       return null;
     }
     return new RpcException(s.substring(prefix.length, s.length));
   }
 }