GitLab

(syms_of_frame): Initialize and defvar it.
(Fdelete_frame): Use it instead of delete-frame-hook.  Don't run
it when frame's `tooltip' parameter is non-nil.

* xfns.c (x_create_tip_frame): Set `tooltip' frame parameter to t.

* w32fns.c (x_create_tip_frame): Likewise

* macfns.c (x_create_tip_frame): Likewise.