Rebaseline existing Skia suppressions.

TBR=robertphillips@chromium.org
BUG=258850

Review URL: https://codereview.chromium.org/19793012

git-svn-id: svn://svn.chromium.org/blink/trunk@154755 bbb929c8-8fbe-4397-9dbb-9b2b20218538