Make access-control-basic-get-fail-non-simple.cgi output 403 for OPTIONS explicitly

BUG=391391

Review URL: https://codereview.chromium.org/368353003

git-svn-id: svn://svn.chromium.org/blink/trunk@177539 bbb929c8-8fbe-4397-9dbb-9b2b20218538