Rewrite fast/multicol/scrolling-overflow.html to a reftest.

BUG=386567
R=andersr@opera.com

Review URL: https://codereview.chromium.org/788403007

git-svn-id: svn://svn.chromium.org/blink/trunk@188377 bbb929c8-8fbe-4397-9dbb-9b2b20218538
8 files changed
tree: 9b180f11df61832e1b9d2d1296ac36ba0657180e
  1. third_party/