We're currently only setting usesWebKitBehavior for in-process layers, not remote ones.
Pull request: https://github.com/WebKit/WebKit/pull/9296
Committed 259591@main (d131f27ae0d7): <https://commits.webkit.org/259591@main> Reviewed commits have been landed. Closing PR #9296 and removing active labels.
<rdar://problem/104840618>