CFI builds on PlayStation failed when a LocalFrame was made and then the Frame construction made the FrameTree because that was trying to cast what was effectively *this to LocalFrame, but that wasn't yet a LocalFrame so was picked up as a bad derived cast. As the value was only being used there to stick into a Frame&, remove the cast.
Pull request: https://github.com/WebKit/WebKit/pull/12659
Committed 262878@main (f7167b05ac1a): <https://commits.webkit.org/262878@main> Reviewed commits have been landed. Closing PR #12659 and removing active labels.
<rdar://problem/107951657>