[Cocoa] RELEASE_ASSERT when calling registerSupplementalVP9Decoder() when VideoToolbox.framework is not present
<rdar://problem/66010949>
Created attachment 405074 [details] Patch
Committed r264791: <https://trac.webkit.org/changeset/264791> All reviewed patches have been landed. Closing bug and clearing flags on attachment 405074 [details].