Uses an open thread handle as the ThreadJoinId on Windows.

runtime/vm/thread_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/isolate.h"
 #include "vm/lockers.h"
 #include "vm/unit_test.h"
 #include "vm/profiler.h"
 #include "vm/safepoint.h"
@@ skipping 422 matching lines @@
 }
 
 
 VM_TEST_CASE(ThreadIterator_FindSelf) {
   OSThread* current = OSThread::Current();
   EXPECT(OSThread::IsThreadInList(current->join_id()));
 }
 
 
 struct ThreadIteratorTestParams {
-  ThreadId spawned_thread_join_id;
+  ThreadJoinId spawned_thread_join_id;
   Monitor* monitor;
 };
 
 
 void ThreadIteratorTestMain(uword parameter) {
   ThreadIteratorTestParams* params =
       reinterpret_cast<ThreadIteratorTestParams*>(parameter);
   OSThread* thread = OSThread::Current();
   EXPECT(thread != NULL);
 
@@ skipping 117 matching lines @@
       TransitionVMToBlocked transition(thread);
       MonitorLocker ml(&done_monitor);
       if (done) {
         break;
       }
     }
   }
 }
 
 }  // namespace dart