Reactivate SVG mask-type tests for Mac. Change the content of the tests to the bare minimum. It still is enough to test the feature itself.
Created attachment 225602 [details] Patch
Comment on attachment 225602 [details] Patch Clearing flags on attachment: 225602 Committed r164946: <http://trac.webkit.org/changeset/164946>
All reviewed patches have been landed. Closing bug.