[Merge] lp:~artmello/webbrowser-app/webbrowser-app-statesaver into lp:webbrowser-app

[Olivier Tilloy]

Review: Disapprove

Superseded by https://code.launchpad.net/~osomon/webbrowser-app/persist-open-tabs/+merge/229920.
Thanks for your initial work on this Arthur!
-- 
https://code.launchpad.net/~artmello/webbrowser-app/webbrowser-app-statesaver/+merge/227737
Your team Ubuntu Phablet Team is subscribed to branch lp:webbrowser-app.