Google's solution for Chrome on Debian and Ubuntu is to distribute a .deb package that installs not only Chrome, but also installs a reference to their own pack

Google's solution for Chrome on Debian and Ubuntu is to distribute a .deb package that installs not only Chrome, but also installs a reference to their own package repository. When the user updates packages on their system, it updates Chrome from Google's repository. Chrome does not update itself, nor can it, since the package installs it to /usr/bin, which would require a su/sudo prompt to get access to.