[chrome] re-add (unhide) www in address bar

visit
[code:1:a900a54c51]chrome://flags/#omnibox-ui-hide-steady-state-url-scheme-and-subdomains[/code:1:a900a54c51]

set
Omnibox UI Hide Steady-State URL Trivial Subdomains

to Disabled and restart to see the www. again.