Currently, mouse events passed to site-isolated frames will be offset if the target frame or target frame’s ancestors are scrolled.
<rdar://problem/116690742>
Pull request: https://github.com/WebKit/WebKit/pull/18854
Committed 269143@main (20e46bea66da): <https://commits.webkit.org/269143@main> Reviewed commits have been landed. Closing PR #18854 and removing active labels.