| Index: runtime/vm/os_thread_win.cc
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| diff --git a/runtime/vm/os_thread_win.cc b/runtime/vm/os_thread_win.cc
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| index ed8de4af8d4abb2fe43d667b6a87ad039fbb23f5..6be68048efa47c6c89b1a76c3a402f679d055ee5 100644
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| --- a/runtime/vm/os_thread_win.cc
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| +++ b/runtime/vm/os_thread_win.cc
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| @@ -125,9 +125,11 @@ ThreadId OSThread::GetCurrentThreadId() {
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|  }
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|  
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|  
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| +#ifndef PRODUCT
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|  ThreadId OSThread::GetCurrentThreadTraceId() {
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|    return ::GetCurrentThreadId();
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|  }
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| +#endif  // PRODUCT
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|  
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|  
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|  ThreadJoinId OSThread::GetCurrentThreadJoinId(OSThread* thread) {
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| 
 |