Don't allow position:sticky for table columns.
    
Table columns don't create RenderLayer and it causes crash in sticky offset calculation.

BUG=351390

Review URL: https://codereview.chromium.org/196413002

git-svn-id: svn://svn.chromium.org/blink/trunk@169149 bbb929c8-8fbe-4397-9dbb-9b2b20218538