* bookmark.el (bookmark-set): Don't check for

* bookmark.el (bookmark-set): Don't check for
`bookmark-make-name-function' since `bookmark-buffer-file-name'
already takes care of this.
(bookmark-buffer-name): Removed Info-mode specific code.
(bookmark-buffer-file-name): Removed Info-mode specific code.

* info.el (bookmark-get-info-node): Define this function in
info.el, not in bookmark.el.
(Info-mode): Set `bookmark-make-name-function' to
`Info-bookmark-make-name' locally.
(Info-bookmark-make-name): New function.

* bookmark.el (bookmark-make-name-function): New variable.