Gardening: svg/custom/foreign-object-skew.svg fails on Mac.

TBR=ojan, reed@google.com
BUG=268692
NOTRY=true

Review URL: https://codereview.chromium.org/284453002

git-svn-id: svn://svn.chromium.org/blink/trunk@173867 bbb929c8-8fbe-4397-9dbb-9b2b20218538