Ensure redisplay using variable watcher

This replaces looking up the variable name in redisplay--variables when
setting it.

* lisp/frame.el: Replace redisplay--variables with add-variable-watcher
calls.
* src/xdisp.c (Fset_buffer_redisplay): Rename from maybe_set_redisplay,
set the redisplay flag unconditionally.
(Vredisplay__variables): Remove it.
* src/data.c (set_internal): Remove maybe_set_redisplay call.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/window.h b/src/window.h
index a124b3311d0..4a102f2246e 100644
--- a/src/window.h
+++ b/src/window.h
@@ -1063,7 +1063,6 @@ extern void wset_redisplay (struct window *w);
 extern void fset_redisplay (struct frame *f);
 extern void bset_redisplay (struct buffer *b);
 extern void bset_update_mode_line (struct buffer *b);
-extern void maybe_set_redisplay (Lisp_Object);
 /* Call this to tell redisplay to look for other windows than selected-window
    that need to be redisplayed.  Calling one of the *set_redisplay functions
    above already does it, so it's only needed in unusual cases.  */