This opens up an opportunity for potentially making PreciseAllocations polymorphic with MarkedBlocks.
Created attachment 461630 [details] EWS testing.
<rdar://problem/98709256>
Pull request: https://github.com/WebKit/WebKit/pull/3349
Committed 253482@main (6af7334a69e5): <https://commits.webkit.org/253482@main> Reviewed commits have been landed. Closing PR #3349 and removing active labels.