[iPadOS] A video cannot return to element fullscreen from picture-in-picture under stress tests
<rdar://problem/79696652>
Created attachment 432100 [details] [fast-cq] Patch
Committed r279206 (239092@main): <https://commits.webkit.org/239092@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 432100 [details].