Reorder GoaProviderClass fields as it's private now
Reorder GoaProviderClass fields as it's private now

We can group all pure virtual functions together, and drop the structure
padding as GoaProvider is not publicly exposed anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=752941

ritzk/gnome-online-accounts,ritzk/gnome-online-accounts,ritzk/gnome-online-accounts,felipeborges/gnome-online-accounts,felipeborges/gnome-online-accounts,felipeborges/gnome-online-accounts