Assertion Failure in WebCore::RenderLayerCompositor::updateCompositingLayers.
https://bugs.webkit.org/show_bug.cgi?id=106419.

Unreviewed.

Updated Expectations.

* platform/mac/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139168 268f45cc-cd09-0410-ab3c-d52691b4dbfc