Rebaseline four failures introduced in the latest skia roll (r280677).

TBR=bungeman@chromium.org
BUG=

Review URL: https://codereview.chromium.org/365553002

git-svn-id: svn://svn.chromium.org/blink/trunk@177259 bbb929c8-8fbe-4397-9dbb-9b2b20218538