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

Unreviewed.

Updated Expectations.

* platform/mac/TestExpectations:

git-svn-id: svn://svn.chromium.org/blink/trunk@139168 bbb929c8-8fbe-4397-9dbb-9b2b20218538