Rebaseline fast/table/empty-cells.html after r168119

TBR=jchaffraix@chromium.org

Review URL: https://codereview.chromium.org/184553005

git-svn-id: svn://svn.chromium.org/blink/trunk@168131 bbb929c8-8fbe-4397-9dbb-9b2b20218538