bug#3303: delete-frame raises old (invisible) frame

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> Still, the
>> 
>> #ifdef NS_IMPL_COCOA
>> /* term gets no other notification of this */
>> if (for_deletion)
>> Fraise_frame(Qnil);
>> #endif
>> 
>> in frame.c looks plain wrong and should probably just be deleted:
>> frame-selection is never intended to raise (or lower) any frame.
>> If this `raise' is really necessary, then it needs a much more extensive
>> comment justifying its presence.
>> Adrian, could you remove this code, or justify clearly why it's here?

> I think it is there because we need to raise another (visible) frame when
> a frame is deleted.  This is standard behavior (and sensible).

This is a behavior which depends on the window-management policy, so
it's the responsibility of the window-manager (which may even decide
that the focus should return to some other application, which would make
a lot of sense if the frame was created via $EDITOR=emacsclient).

So, I'd still want to know what undesirable behavior would happen under
NS if we don't call Fraise_frame here (and also, why it needs to be
called here rather than elsewhere).


        Stefan