Fix Windows take 3

runtime/vm/os_thread_win.h

 // 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.
 
 #ifndef VM_OS_THREAD_WIN_H_
 #define VM_OS_THREAD_WIN_H_
 
 #if !defined(VM_OS_THREAD_H_)
 #error Do not include os_thread_win.h directly; use os_thread.h instead.
 #endif
@@ skipping 133 matching lines @@
 
   DISALLOW_ALLOCATION();
 };
 
 
 template<typename T>
 class MallocGrowableArray;
 
 
 class ThreadLocalData : public AllStatic {
+ public:
+  static void RunDestructors();
+
  private:
   static void AddThreadLocal(ThreadLocalKey key, ThreadDestructor destructor);
   static void RemoveThreadLocal(ThreadLocalKey key);
 
-  static void RunDestructors();
-
   static Mutex* mutex_;
   static MallocGrowableArray<ThreadLocalEntry>* thread_locals_;
 
   static void InitOnce();
   static void Shutdown();
 
   friend class OS;
   friend class OSThread;
 };
 
 }  // namespace dart
 
 #endif  // VM_OS_THREAD_WIN_H_