| 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 cdcf36ca49cfdcfee4e00663f38218a742cbdbcc..126594910b55bc0cae7d1169ee3b59f25039a100 100644
 | 
| --- a/runtime/vm/os_thread_win.cc
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| +++ b/runtime/vm/os_thread_win.cc
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| @@ -118,6 +118,11 @@ intptr_t OSThread::ThreadIdToIntPtr(ThreadId id) {
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|  }
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|  
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|  
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| +ThreadId OSThread::ThreadIdFromIntPtr(intptr_t id) {
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| +  return static_cast<ThreadId>(id);
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| +}
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| +
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| +
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|  bool OSThread::Compare(ThreadId a, ThreadId b) {
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|    return a == b;
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|  }
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| 
 |