Re: tooltip frame uses (class mono) when processing defface specs

[Richard Stallman]

    Looks to me as if for ordinary frames, x-create-frame-with-faces adds
    the display-type frame parameter, when it calls
    frame-set-background-mode (before going on to call
    face-set-after-frame-default).

Is there any sensible way to handle the class for tooltip frames in a
fashion parallel to that?  If you find one, please implement that.
Otherwise, let's use the existing patch.