Unreviewed gardening. Adding cr-linux image baseline for
http://trac.webkit.org/changeset/138755

* platform/chromium-linux/fast/regions/full-screen-video-from-region-expected.png: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138760 268f45cc-cd09-0410-ab3c-d52691b4dbfc