5b95f809ca
Sometimes it may be useful for roles to put callbacks in the generic surface frame callback queue. The surface frame callback queue will either eventually be processed on the next surface role assignment that places the frame callbacks in a role specific queue, processed at some other point in time by a role, or cleaned up on surface destruction. https://gitlab.gnome.org/GNOME/mutter/issues/240 (cherry picked from commit 0ace58d05f3e50f4fdcf4971baab163e6ae5a1e9)