Note that Chrome already describes HTTP sites as "not secure", this change just makes it more prominent. If you click the little circled "i" on any HTTP site,

Note that Chrome already describes HTTP sites as "not secure", this change just makes it more prominent. If you click the little circled "i" on any HTTP site, it shows this messsage: > Your connection to this site is not secure > You should not enter any sensitive information on this site (for example, passwords or credit cards), because it could be stolen by attackers.