This bug covers fixing the scrollbar-width implementation in WebKit legacy. The following files along with tests are what need changing. WebDynamicScrollBarsView.mm WebHTMLView.mm WebHTMLViewPrivate.h
<rdar://problem/109907955>
Pull request: https://github.com/WebKit/WebKit/pull/14424
Committed 264633@main (e55f3a44ffb2): <https://commits.webkit.org/264633@main> Reviewed commits have been landed. Closing PR #14424 and removing active labels.