[prophesi]

That article is from 2013. You can set a master password on Chrome now. It then requests that password whenever you wish to view a password in the manager.

If you don't set a master password, then your passwords are (presumably) encrypted with your google account. So anyone using Chrome that's logged into your google account will be able to view the passwords via settings. So just don't let malicious users use your Chrome?

Edit: And there's also a guest mode for Chrome, but they can just exit out of the window and run a regular instance of Chrome to use it under your profile.