GitLab

For some reason, the default checkbox appears underneath the styled checkbox on Mac. This sets the visibility to hidden so that it won't peek out anymore.

BUG=386867
R=dbeam@chromium.org

Review URL: https://codereview.chromium.org/378093003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281974 0039d316-1c4b-4281-b951-d872f2087c98