Makes it so that when a folder is open on the bookmark bar and the...

views/controls/menu/menu_delegate.h

 // Copyright (c) 2006-2008 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 VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
 #define VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
 
 #include <set>
 #include <string>
 
 #include "app/drag_drop_types.h"
 #include "app/os_exchange_data.h"
 #include "base/logging.h"
 #include "views/controls/menu/controller.h"
+#include "views/controls/menu/menu_item_view.h"
 #include "views/event.h"
 
 namespace views {
 
 class DropTargetEvent;
-class MenuItemView;
+class MenuButton;
 
 // MenuDelegate --------------------------------------------------------------
 
 // Delegate for a menu. This class is used as part of MenuItemView, see it
 // for details.
 // TODO(sky): merge this with Menu2Model.
 class MenuDelegate : Controller {
  public:
   // Used during drag and drop to indicate where the drop indicator should
   // be rendered.
@@ skipping 142 matching lines @@
   }
 
   // Notification the menu has closed. This is only sent when running the
   // menu for a drop.
   virtual void DropMenuClosed(MenuItemView* menu) {
   }
 
   // Notification that the user has highlighted the specified item.
   virtual void SelectionChanged(MenuItemView* menu) {
   }
+
+  // If the user drags the mouse outside the bounds of the menu the delegate
+  // is queried for a sibling menu to show. If this returns non-null the
+  // current menu is hidden, and the menu returned from this method is shown.
+  //
+  // The delegate owns the returned menu, not the controller.
+  virtual MenuItemView* GetSiblingMenu(MenuItemView* menu,
+                                       const gfx::Point& screen_point,
+                                       MenuItemView::AnchorPosition* anchor,
+                                       bool* has_mnemonics,
+                                       MenuButton** button) {
+      return NULL;
+  }
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_