Work around failing multicol tests on Mac introduced by enabling HarfBuzz.

Two tests fixed: list-item.html and table-cell.html

BUG=334269
R=andersr@opera.com

Review URL: https://codereview.chromium.org/845683003

git-svn-id: svn://svn.chromium.org/blink/trunk@188212 bbb929c8-8fbe-4397-9dbb-9b2b20218538
5 files changed