Gtk+ freeze break request

[Marek Kasik <mkasik redhat com>]

Bug 723368 - GTK+ print module for Google Cloud Print
 - https://bugzilla.gnome.org/show_bug.cgi?id=723368

Tim Waugh prepared a patch which adds new print backend to Gtk+. It
supports Google Cloud Print printers. Once you are logged to your Google
account through gnome-online-accounts, you can use your printers
configured on your Google account.

I've been testing and reviewing the module for almost a week and I think
that it is ready to be pushed to Gtk+.

Regards

Marek