(update_frame_tool_bar): Remove old_req, new_req. Do not get tool bar
height, call xg_update_tool_bar_sizes instead.
(free_frame_tool_bar): Remove from hbox or vbox depending on
- toolbar_in_hbox, Set all FRAME_TOOLBAR_*_(WIDTH|HEIGHT) to zero.
+ toolbar_in_hbox. Set all FRAME_TOOLBAR_*_(WIDTH|HEIGHT) to zero.
(xg_change_toolbar_position): New function.
* frame.h (struct frame): Add tool_bar_position.