PIP on netflix.com shows only a gray window and spinner
<rdar://problem/64919493>
Created attachment 405421 [details] Patch
Created attachment 405656 [details] A better patch based on Jer's idea
Committed r265145: <https://trac.webkit.org/changeset/265145> All reviewed patches have been landed. Closing bug and clearing flags on attachment 405656 [details].