Refactor WebKit media playback process assertion logic to minimize chances of leaking them.
Created attachment 396798 [details] Patch
<rdar://problem/61950339>
ping review?
Comment on attachment 396798 [details] Patch r=me
Committed r260373: <https://trac.webkit.org/changeset/260373> All reviewed patches have been landed. Closing bug and clearing flags on attachment 396798 [details].