Remove dummy WebSettings::setRegionBasedColumnsEnabled().

It had to linger until the Chromium side had stopped calling it.

BUG=350853
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/1167753004

git-svn-id: svn://svn.chromium.org/blink/trunk@196571 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed