HTMLOListElement::updateListItem should update distribution if needed.

BUG=353233
TEST=fast/dom/shadow/ol-with-distribution-recalc-crash.html

Review URL: https://codereview.chromium.org/204343002

git-svn-id: svn://svn.chromium.org/blink/trunk@169615 bbb929c8-8fbe-4397-9dbb-9b2b20218538