Clean up scrollbar creation code in RenderLayerScrollableArea
Created attachment 430940 [details] Patch
Comment on attachment 430940 [details] Patch Sometimes the nullopt value of optional<bool> puzzles me. It's not too bad here though.
Committed r278661 (238643@main): <https://commits.webkit.org/238643@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 430940 [details].
<rdar://problem/79079650>
This seems to have broken the Windows build. https://ews-build.webkit.org/#/builders/10/builds/95353
Fixing
Fixed in r278664.