Chromium Code Reviews| Index: runtime/vm/os_thread.cc | 
| diff --git a/runtime/vm/os_thread.cc b/runtime/vm/os_thread.cc | 
| index 75a7a31850d3b201fc552bd87481a8e9cd3e208d..3700c9f0ca1c01a62bf11924d51a7a3b2ed917f3 100644 | 
| --- a/runtime/vm/os_thread.cc | 
| +++ b/runtime/vm/os_thread.cc | 
| @@ -26,7 +26,9 @@ OSThread::OSThread() : | 
| #if defined(DEBUG) | 
| join_id_(kInvalidThreadJoinId), | 
| #endif | 
| +#ifndef PRODUCT | 
| trace_id_(OSThread::GetCurrentThreadTraceId()), | 
| +#endif | 
| name_(NULL), | 
| timeline_block_lock_(new Mutex()), | 
| timeline_block_(NULL), |