Comment 3 for bug 878901

I created a testcase for this now, for me the following code works:

// Automatically upgrade packages from these (origin:archive) pairs
Unattended-Upgrade::Allowed-Origins {
        "Google\, Inc.:stable";
 "${distro_id}:${distro_codename}-security";
};

if it does not work for you, please wait until a new google-chrome-stable becomes availalbe, then please run:
$ apt-cache policy google-chrome-stable
and
$ sudo unattended-upgrades --debug --dry-run
and attach the output.

Thanks,
 Michael