Stop using UncheckedLock in JSC::PerfLog and use Lock instead to benefit from Clang thread safety analysis.
Created attachment 429621 [details] Patch
Committed r278055 (238139@main): <https://commits.webkit.org/238139@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 429621 [details].
<rdar://problem/78481867>