(require): CL no longer needed to compile case.

(require): CL no longer needed to compile case.
(tooltip-mode): Do not toggle functions for GUD tooltips.
(tooltip-gud-tips-p): Remove. Replace with minor mode
gud-tooltip-mode in gud.el.
(tooltip-gud-modes, tooltip-gud-display, tooltip-gud-echo-area)
(tooltip-gud-toggle-dereference): Rename in gud.el by replacing
tooltip-gud prefix with gud-tooltip and obsolete.
(tooltip-change-major-mode, tooltip-activate-mouse-motions-if-enabled)
(tooltip-mouse-motions-active, tooltip-activate-mouse-motions)
(tooltip-mouse-motion): Mouse movement functions/variable.
Rename in gud.el by adding gud prefix.
(tooltip-gud-original-filter, tooltip-gud-dereference)
(tooltip-gud-event, tooltip-toggle-gud-tips)
(tooltip-gud-process-output, tooltip-gud-print-command)
(tooltip-gud-tips): GUD tooltip functions/variables. Rename in
gud.el by replacing tooltip-gud prefix with gud-tooltip.
(gdb-tooltip-print): Move to gdb-ui.el.