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Created attachment 434526 [details] Patch
Comment on attachment 434526 [details] Patch r=me although I think that frame.remove() would be more concise.
Created attachment 434545 [details] Patch for landing
Committed r280438 (240076@main): <https://commits.webkit.org/240076@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 434545 [details].
<rdar://problem/81283597>