* src/haikufns.c (haiku_change_tab_bar_height):
* src/nsfns.m (ns_change_tab_bar_height):
* src/pgtkfns.c (pgtk_change_tab_bar_height):
* src/w32fns.c (w32_change_tab_bar_height):
* src/xfns.c (x_change_tab_bar_height): Do not round tab bar
height up.  (bug#59285, bug#59271)

* src/nsfns.m (Fns_read_file_name): Use '-' instead of '_' when naming
args.

* doc/lispref/frames.texi (Management Parameters): Document
`use-frame-synchronization'.
* etc/NEWS: Update entry.

* src/frame.c (frame_parms): New frame parameter
`use-frame-synchronization'.
(syms_of_frame): New defsym.
* src/haikufns.c (haiku_frame_parm_handlers):
* src/nsfns.m (ns_frame_parm_handlers):
* src/pgtkfns.c (pgtk_frame_parm_handlers):
* src/w32fns.c (w32_frame_parm_handlers): Update frame param
handlers correctly.
* src/xfns.c (x_set_use_frame_synchronization): New function.
(Fx_create_frame): Set default value of said parameter.
(x_frame_parm_handlers): Add handler.

* src/xterm.c (x_sync_wait_for_frame_drawn_event): Clear
parameter if sync fails.

* src/haikufns.c (Fx_show_tip):
* src/nsfns.m (Fx_show_tip): Allow sharing existing tooltip
frames between any two frames.
* src/xfns.c (Fx_show_tip): Allow that but only between frames
on the same X display.

* src/haikufns.c (Fx_show_tip):
(syms_of_haikufns):
* src/nsfns.m (Fx_show_tip):
(syms_of_nsfns):
* src/pgtkfns.c (Fx_show_tip):
(syms_of_pgtkfns):
* src/xfns.c (Fx_show_tip):
(syms_of_xfns): Add assertion and adjust default values.

* src/alloc.c (deadp):
* src/buffer.c (reset_buffer_local_variables, candidate_buffer)
(Fkill_buffer, Fbuffer_swap_text, Fmake_overlay, Fmove_overlay):
* src/callint.c (Fcall_interactively):
* src/coding.c (decode_coding_object, encode_coding_object)
(code_convert_region, Ffind_operation_coding_system):
* src/comp.c (Fcomp_el_to_eln_rel_filename):
* src/conf_post.h (RE_TRANSLATE_P):
* src/data.c (Fkill_local_variable, Fash, expt_integer):
* src/dired.c (file_name_completion):
* src/dispnew.c (set_window_cursor_after_update, update_frame_1)
(Fframe_or_buffer_changed_p):
* src/doc.c (Fdocumentation, Fdocumentation_property)
(default_to_grave_quoting_style):
* src/editfns.c (Fconstrain_to_field, save_excursion_save)
(save_excursion_restore, Fngettext):
* src/eval.c (Fautoload, un_autoload, specbind):
* src/fileio.c (Fmake_temp_file_internal):
* src/fns.c (string_char_to_byte, string_byte_to_char)
(Fnthcdr, Fnreverse):
* src/indent.c (vmotion):
* src/inotify.c (add_watch):
* src/keyboard.c (command_loop_1, read_char)
(read_char_minibuf_menu_prompt):
* src/lread.c (oblookup):
* src/macfont.m (macfont_descriptor_entity, macfont_open):
* src/minibuf.c (Finnermost_minibuffer_p, Ftry_completion)
(Ftest_completion):
* src/nsfns.m (ns_set_icon_name):
* src/pdumper.c (dump_queue_dequeue):
* src/pgtkfns.c (pgtk_set_icon_type, pgtk_set_icon_name):
* src/process.c (Faccept_process_output):
* src/textprop.c (set_text_properties):
* src/w32fns.c (w32_set_icon_type, w32_set_icon_name):
* src/w32select.c (validate_coding_system):
* src/window.c (decode_next_window_args, window_loop)
(save_window_save):
* src/xdisp.c (wset_redisplay):
* src/xfaces.c (Fx_family_fonts, resolve_face_name)
(gui_supports_face_attributes_p):
* src/xfns.c (x_set_icon_type, x_set_icon_name):
* src/xselect.c (clean_local_selection_data):
Use BASE_EQ instead of EQ where it is obvious that neither argument
can be a symbol with properties or at least one argument is a
non-symbol.

* src/nsfns.m (ns_move_tooltip_to_mouse_location):
* src/nsterm.m ([EmacsWindow draggedImage:movedTo:]): Pacify GCC.

* lisp/term/ns-win.el (x-begin-drag): Pass `follow-tooltip'.
* src/nsfns.m (Fx_show_tip): Record last dx and dy.
(syms_of_nsfns): New staticpros.
* src/nsmenu.m ([EmacsTooltip moveTo:]): New method.

* src/nsselect.m (Fns_begin_drag): New parameter
`follow-tooltip'.

* src/nsterm.h (@interface EmacsWindow):
(EmacsTooltip): Update prototypes.
* src/nsterm.m ([EmacsWindow draggedImage:movedTo:]): Move any
tooltip to the right location.
([EmacsWindow beginDrag:forPasteboard...]): New parameter
`followTooltip'.

* lisp/term/ns-win.el (ns-selection-exists-p):
(gui-backend-set-selection):
(x-begin-drag): New functions and selection types.
* src/nsfns.m (Fns_get_resource):
(Fns_set_resource):
(Fx_server_max_request_size): Fix coding style.
* src/nsselect.m (ns_decode_data_to_pasteboard):
(ns_lisp_to_pasteboard):
(ns_dnd_action_to_operation):
(ns_dnd_action_from_operation):
(Fns_begin_drag): New functions.
(syms_of_nsselect): New subrs.
* src/nsterm.h (EmacsWindow): New fields and messages.
(NSPasteboardNameGeneral): New define.
* src/nsterm.m ([EmacsView mouseDown:]): Store last mouse event.
([EmacsWindow initWithEmacsFrame:fullscreen:screen:]): Clear that event.
([EmacsWindow dealloc]): Free last mouse event.