WTF provides two thread specific storages, ThreadSpecific and threadSpecificKeyCreate. Only DisallowVMReentry and DeferGC are using threadSpecificKeyCreate. WTF::ThreadSpecific should be used because it is a useful wrapper.
Created attachment 383860 [details] Patch
Comment on attachment 383860 [details] Patch r=me
Committed r252671: <https://trac.webkit.org/changeset/252671>
<rdar://problem/57344999>