This test is checking that we compute correct the correct contents scale for a layer that has a singular matrix, but still renders. This was previously the case for scaleZ(0), but we no longer render those (to match other browsers), so this case isn't possible.
<rdar://104513852>
Pull request: https://github.com/WebKit/WebKit/pull/8959
Committed 259337@main (7399948b5193): <https://commits.webkit.org/259337@main> Reviewed commits have been landed. Closing PR #8959 and removing active labels.