The size of the framebuffer provided by the compositor may change during the life of a session. Detect this and respond to it.
<rdar://problem/101151986>
Pull request: https://github.com/WebKit/WebKit/pull/5357
Committed 255543@main (2da8807b15a6): <https://commits.webkit.org/255543@main> Reviewed commits have been landed. Closing PR #5357 and removing active labels.