The PerformanceMonitor related uses of DeprecatedGlobalSettings can easily be moved to Settings, as PerformanceMonitor has a Page reference. None of these are actually settings in the traditional sense right now, as they are immutable, so we could just make them #defines, but given how easy it is move them to Settings, I think that makes the most sense here.
Created attachment 407521 [details]
Created attachment 407540 [details]
Committed r266328: <https://trac.webkit.org/changeset/266328>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 407540 [details].