Use LazyNeverDestroyed instead of DEFINE_GLOBAL for XMLNames, HTMLNames, MathMLNames and SVGNames This is a sub-task of Bug 174979.
Created attachment 317097 [details] WIP patch
Created attachment 325324 [details] Patch
Created attachment 325336 [details] Patch
Comment on attachment 325336 [details] Patch Clearing flags on attachment: 325336 Committed r224213: <https://trac.webkit.org/changeset/224213>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35568903>