Google Chrome should soon feature a password generator feature.
Chromium builds are also shipping with Password Generation now. Though you have to enable it manually using –enable-password-generation switch.
Chromium developers spoke about this new feature:
Chrome’s long term solution to this problem is browser sign in plus OpenID. While implementing browser sign in is something that we can control, getting most sites on the internet to use OpenID will take a while. In the meantime it would be nice to have a way to achieve the same effect of having the browser control authentication. Currently you can mostly achieve this goal through Password Manager and Browser Sync, but users still know their passwords so they are still susceptible to phishing. By having Chrome generate passwords for users, we can remove this problem.