[Mac] Show context menu on empty BMB item.

chrome/browser/ui/cocoa/bookmarks/bookmark_context_menu_cocoa_controller.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_CONTEXT_MENU_COCOA_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_CONTEXT_MENU_COCOA_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
@@ skipping 33 matching lines @@
   base::scoped_nsobject<MenuController> menuController_;
 }
 
 // Initializes the BookmarkContextMenuCocoaController for the given bookmark
 // bar |controller|.
 - (id)initWithBookmarkBarController:(BookmarkBarController*)controller;
 
 // Returns an NSMenu customized for |node|. Works under the assumption that
 // only one menu should ever be shown at a time, and thus caches the last
 // returned menu and re-creates it if a menu for a different node is requested.
-// Passing in a NULL |node| will return the menu for the bookmark bar itself.
+// Passing in a NULL |node| will return the menu for "empty" placeholder.
 - (NSMenu*)menuForBookmarkNode:(const BookmarkNode*)node;
 
+// Returns an NSMenu customized for the bookmark bar.
+- (NSMenu*)menuForBookmarkBar;
+
 // Closes the menu, if it's currently open.
 - (void)cancelTracking;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_CONTEXT_MENU_COCOA_CONTROLLER_H_