AccessibilityARIAGrid objects need to be re-generated when the underlying role attribute changes since instances of this class are created based on the value of the role attribute.
<rdar://problem/96989465>
Created attachment 460883 [details] Patch
Created attachment 460926 [details] Patch
Created attachment 460929 [details] Patch Skip test in wk1.
Committed 252550@main (c985ebf3b43c): <https://commits.webkit.org/252550@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 460929 [details].