Gardening: Image rebase gradient-with-scaled-ancestor.html on Win

BUG=248155,363772
TBR=danakj@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/256183003

git-svn-id: svn://svn.chromium.org/blink/trunk@172784 bbb929c8-8fbe-4397-9dbb-9b2b20218538