Bug 1486573 - Track changes to nsPipeOutputStream writer count, r=froydnj.

--HG--
extra : rebase_source : f6a62ea3572e29424851c29c5b9526aab9d29bf5

xpcom/io/nsPipe3.cpp

@@ -283,7 +283,7 @@ private:
   nsPipe*                         mPipe;
 
   // separate refcnt so that we know when to close the producer
-  mozilla::ThreadSafeAutoRefCnt   mWriterRefCnt;
+  ThreadSafeAutoRefCntWithRecording<recordreplay::Behavior::Preserve> mWriterRefCnt;
   int64_t                         mLogicalOffset;
   bool                            mBlocking;