I created a separate Chrome profile, and logged in to gmail. Then I disabled javascript, then deleted all my google.com cookies (but left my mail.google.com cookies). Then I reenabled javascript and visited mail.google.com again. I was logged out. So Google is using the google.com cookies.
I created a separate Chrome profile, and logged in to gmail. Then I disabled javascript, then deleted all my google.com cookies (but left my mail.google.com cookies). Then I reenabled javascript and visited mail.google.com again. I was logged out. So Google is using the google.com cookies.