[Win] Use NeverDestroyed template.
https://bugs.webkit.org/show_bug.cgi?id=157345

Reviewed by Darin Adler.

* wtf/ThreadingWin.cpp:
(WTF::threadMapMutex):
(WTF::threadMap):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@200420 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2 files changed