We need to call _prepareAccessibilityCall before trying to access self.axBackingObject in WebAccessibilityObjectWrapperIOS::accessibilityIsInNonNativeTextControl
<rdar://problem/122817575>
rdar://122778867
Created attachment 469836 [details] Patch
Committed 274497@main (58895edc47c1): <https://commits.webkit.org/274497@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 469836 [details].