Re-baseline virtual/threaded/compositing/visibility/visibility-image-layers.html after https://src.chromium.org/viewvc/chrome?revision=271567&view=revision .

BUG=
TBR=reveman@chromium.org,timvolodine@chromium.org

Review URL: https://codereview.chromium.org/298783002

git-svn-id: svn://svn.chromium.org/blink/trunk@174397 bbb929c8-8fbe-4397-9dbb-9b2b20218538