Chromium, mac-wk2 and mac need new baselines after fixing paint phases for composited scrolling.
https://bugs.webkit.org/show_bug.cgi?id=107952

New baseline for Mac.

* platform/mac/compositing/overflow/composited-scrolling-creates-a-stacking-container-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145092 268f45cc-cd09-0410-ab3c-d52691b4dbfc