The PlatformWebView and EventSenderProxy implementations just use libwpe directly.
Created attachment 452053 [details] Patch
Created attachment 452054 [details] Patch
Created attachment 452060 [details] Patch
Created attachment 452061 [details] Patch
AppleWin doesn't use WebKitTestRunner so the failure is unrelated to this change.
Comment on attachment 452061 [details] Patch LGTM.
Committed r289887 (247325@main): <https://commits.webkit.org/247325@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 452061 [details].
<rdar://problem/89021314>