Plumb the IOSurfacePool through to ImageBufferBackend creation via ImageBuffer::CreationContext
Created attachment 456440 [details] Patch
<rdar://problem/91194046>
Created attachment 456450 [details] Patch
Committed r292273 (249171@main): <https://commits.webkit.org/249171@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 456450 [details].