Change the thread interface in runtime/platform and use it starting all threads

runtime/vm/message_queue_test.cc

 // Copyright (c) 2012, 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 "platform/assert.h"
 #include "vm/message_queue.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
@@ skipping 91 matching lines @@
   }
   shared_queue = NULL;
   delete queue;
   Dart::ShutdownIsolate();
 }
 
 
 TEST_CASE(MessageQueue_WaitNotify) {
   sync = new Monitor();
 
-  Thread* thread = new Thread(MessageReceiver_start, 0);
-  EXPECT(thread != NULL);
+  int result = Thread::Start(MessageReceiver_start, 0);
+  EXPECT_EQ(0, result);
 
   // Wait for the shared queue to be created.
   while (shared_queue == NULL) {
     MonitorLocker ml(sync);
     ml.Wait(5);
   }
   ASSERT(shared_queue != NULL);
 
   // Pile up three messages before the other thread runs.
   for (int i = 0; i < 3; i++) {
@@ skipping 103 matching lines @@
 
   EXPECT(!queue_peer.HasMessage());
   queue.Flush(port1);
 
   // Queue is still empty.
   EXPECT(!queue_peer.HasMessage());
 }
 
 
 }  // namespace dart