Fix race.

runtime/vm/message_queue_test.cc

 // 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.
 
 #include "vm/assert.h"
 #include "vm/message_queue.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
@@ skipping 82 matching lines @@
     EXPECT_EQ(i+2000, *(reinterpret_cast<int*>(msg->data())));
     delete msg;
   }
   shared_queue = NULL;
   delete queue;
   Dart::ShutdownIsolate();
 }
 
 
 TEST_CASE(MessageQueue_WaitNotify) {
+  sync = new Monitor();
+
   Thread* thread = new Thread(MessageReceiver_start, 0);
   EXPECT(thread != NULL);
 
   // Wait for the shared queue to be created.
-  sync = new Monitor();
   {
     MonitorLocker ml(sync);
     ml.Wait(0);
   }
   ASSERT(shared_queue != NULL);
 
   // Pile up three messages before the other thread runs.
   for (int i = 0; i < 3; i++) {
     int* data = reinterpret_cast<int*>(malloc(sizeof(*data)));
     *data = i+1000;
@@ skipping 99 matching lines @@
 
   EXPECT(!queue_peer.HasMessage());
   queue.Flush(port1);
 
   // Queue is still empty.
   EXPECT(!queue_peer.HasMessage());
 }
 
 
 }  // namespace dart