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	for scrollbars if present.
	* lisp.h (window_internal_height, window_internal_width): Add
	extern declarations for these.
	* dispnew.c (direct_output_for_insert, direct_output_forward_char,
	buffer_posn_from_coords): Use window_internal_width instead of
	writing out its definition.
	* indent.c (compute_motion): Doc fix; mention scrollbars and
	window_internal_width.
	(pos_tab_offset, Fvertical_motion): Use window_internal_width
	instead of writing it out.
	* window.c (Fpos_visible_in_window_p, Fwindow_width, Fscroll_left,
	Fscroll_right): Same.
	* xdisp.c (redisplay, try_window, try_window_id,
	display_text_line): Same.

	* xdisp.c (display_string): Add new variable `f', to be W's
	frame.  Use it to set desired_glyphs, and to get the frame's width
	to decide whether or not to draw vertical bars.

	* xdisp.c (display_text_line): If we're using vertical scrollbars,
	don't draw the vertical bars separating side-by-side windows.
	(display_string): Same thing.  Draw spaces to fill in the part of
	the mode line that is under the scrollbar in partial-width
	windows.

	* xdisp.c (display_text_line): Use the usable internal width of
	the window, as calculated above, as the limit on the length of the
	overlay arrow's image, rather than using the window's width field,
	less one.

	* xdisp.c (redisplay): Call condemn_scrollbars_hook and
	judge_scrollbars_hook whenever they are set, not just when the
	frame has vertical scrollbars.

	* termhooks.h (mouse_position_hook): Doc fix.
	(set_vertical_scrollbar_hook): This doesn't return anything any
	more, and doesn't take a struct scrollbar * argument any more.
	(condemn_scrollbars_hook, redeem_scrollbar_hook,
	judge_scrollbars_hook): Doc fixes.
	* term.c (mouse_position_hook): Doc fix.
	(set_vertical_scrollbar_hook): This doesn't return
	anything any more.  Doc fixes.
	* keyboard.c (kbd_buffer_get_event): Receive the scrollbar's
	window from *mouse_position_hook and pass it to
	make_lispy_movement, instead of working with a pointer to a struct
	scrollbar.
	(make_lispy_event): We don't need a window_from_scrollbar function
	anymore; we are given the window directly in *EVENT.
	Unify the code which generates
	text-area mouse clicks and scrollbar clicks; use the same code to
	distinguish clicks from drags on the scrollbar as in the text area.
	Distinguish clicks from drags by storing a copy of the lispy
	position list returned as part of the event.
	(button_down_location): Make this a lisp vector, rather than an
	array of random structures.
	(struct mouse_position): Remove this; it's been replaced by a lisp
	list.
	(make_lispy_movement): Accept the scrollbar's window as a
	parameter, rather than the scrollbar itself.
	If FRAME is zero, assume that the other arguments are garbage.
	(syms_of_keyboard): No need to staticpro each window of
	button_down_location now; just initialize and staticpro it.
	* window.c (window_from_scrollbar): Function deleted; no longer
	needed.
	* xdisp.c (redisplay_window): Just pass the window to
	set_vertical_scrollbar hook; don't pass the scrollbar object too.
	* xterm.c (XTmouse_position): Don't return a pointer to the
	scrollbar for scrollbar motion; instead, return the scrollbar's
	window.

	* xdisp.c (echo_area_display): Move the assignment of f and the
	check for visibility out of the "#ifdef MULTI_FRAME" clause; they
	should work under any circumstances.

	* xdisp.c (redisplay_window): If we're not going to redisplay this
	window because it's a minibuffer whose contents have already been
	updated, go ahead and jump to the scrollbar refreshing code
	anyway; they still need to be updated.  Initialize opoint, so it's
	known to be valid when we jump.  Calculate the scrollbar settings
	properly for minibuffers, no matter what they are displaying at
	the time.

	* xdisp.c (redisplay_windows): Don't restore the current buffer
	and its point before refreshing the scrollbars; we need the buffer
	accurate.