Fix for issue 24243 (allow objects of dart:core and dart:collections to be passed in for now, we ne…

tests/isolate/issue_24243_child2_isolate.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:isolate';
 import "package:expect/expect.dart";
 
-class FromChildIsolate {
-  String toString() => 'from child isolate';
-}
-
 main(List<String> args, message) {
   var sendPort = message;
   try {
-    sendPort.send(new FromChildIsolate());
+    var m0 = <int, String>{1:'one', 2:'two', 3:'three'};
+    var m1 = <int, String>{4:'four', 5:'five', 6:'six'};
+    var m2 = <int, String>{7:'seven', 8:'eight', 9:'nine'};
+    var m = new Map<int, Map<int, String>>.from({0:m0, 1:m1, 2:m2});
+    sendPort.send(m);
   } catch(error) {
-    Expect.isTrue(error is ArgumentError);
     sendPort.send("Invalid Argument(s).");
   }
 }