Fix scheduleImmediate in Dartium.

tests/lib/async/zone_run_test.dart

 // Copyright (c) 2013, 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 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'dart:async';
 
 main() {
   Completer done = new Completer();
   List events = [];
 
   bool shouldForward = true;
   Expect.identical(Zone.ROOT, Zone.current);
   Zone forked = Zone.current.fork(specification: new ZoneSpecification(
       run: (Zone self, ZoneDelegate parent, Zone origin, f()) {
         // The zone is still the same as when origin.run was invoked, which
         // is the root zone. (The origin zone hasn't been set yet).
-        Expect.identical(Zone.current, Zone.ROOT);
+        Expect.identical(Zone.ROOT, Zone.current);
         events.add("forked.run");
         if (shouldForward) return parent.run(origin, f);
         return 42;
       }));
 
   events.add("zone forked");
   Zone expectedZone = forked;
   var result = forked.run(() {
     Expect.identical(expectedZone, Zone.current);
     events.add("run closure");
@@ skipping 26 matching lines @@
 
   done.future.whenComplete(() {
     Expect.listEquals(
         ["zone forked", "forked.run", "run closure", "executed run",
         "forked.run", "executed run2", "forked.run", "run closure 2",
         "after nested scheduleMicrotask", "forked.run", "run closure 3"],
         events);
     asyncEnd();
   });
 }