Uses an open thread handle as the ThreadJoinId on Windows.

runtime/bin/thread_android.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/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
 #include "bin/thread.h"
 #include "bin/thread_android.h"
 
@@ skipping 137 matching lines @@
   const int kStackSize = (128 * kWordSize * KB);
   return kStackSize;
 }
 
 
 ThreadId Thread::GetCurrentThreadId() {
   return gettid();
 }
 
 
-bool Thread::Join(ThreadId id) {
-  return false;
-}
-
-
 intptr_t Thread::ThreadIdToIntPtr(ThreadId id) {
   ASSERT(sizeof(id) == sizeof(intptr_t));
   return static_cast<intptr_t>(id);
 }
 
 
 bool Thread::Compare(ThreadId a, ThreadId b) {
   return (a == b);
 }
 
@@ skipping 156 matching lines @@
 void Monitor::NotifyAll() {
   // TODO(iposva): Do we need to track lock owners?
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)