Add ability to force all cookies to be served with secure

Hello @dpup, @skuwamoto, 

Please review the following commits I made in branch 'don-add-force-secure-cookies'.

71ada27c9adcc6b7d88ee46f4eb3160c3cefa619 (2014-03-20 16:05:04 -0700)
Add ability to force all cookies to be served with secure

R=@dpup
R=@skuwamoto