Investigate why sample fails with SecurityError when the visibility is "blurred" (ie. visible by user input is not obtained)
<rdar://problem/109489889>
Pull request: https://github.com/WebKit/WebKit/pull/13997
Committed 273337@main (f67af466054c): <https://commits.webkit.org/273337@main> Reviewed commits have been landed. Closing PR #13997 and removing active labels.