SendPort + ReceivePort changes:

tests/isolate/src/NestedSpawnTest.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.
 
 // Dart test program for testing that isolates can spawn other isolates.
 
 #library('NestedSpawnTest');
 #import("dart:isolate");
 #import('TestFramework.dart');
 
 class IsolateA extends Isolate {
   IsolateA() : super.heavy();
 
   void main() {
     this.port.receive((msg, replyTo) {
       Expect.equals("launch nested!", msg);
       new IsolateB().spawn().then((SendPort p) {
-        p.call("alive?").receive((msg, ignored) {
+        p.call("alive?").then((msg) {
           Expect.equals("and kicking", msg);
           replyTo.send(499, null);
           this.port.close();
         });
       });
     });
   }
 }
 
 class IsolateB extends Isolate {
   IsolateB() : super.heavy();
 
   void main() {
     this.port.receive((msg, replyTo) {
       Expect.equals("alive?", msg);
       replyTo.send("and kicking", null);
       this.port.close();
     });
   }
 }
 
 test(TestExpectation expect) {
   expect.completes(new IsolateA().spawn()).then((SendPort port) {
-    port.call("launch nested!").receive(expect.runs2((msg, ignored) {
+    port.call("launch nested!").then(expect.runs1((msg) {
       Expect.equals(499, msg);
       expect.succeeded();
     }));
   });
 }
 
 main() {
   runTests([test]);
 }