Replace ButtonDropDown menu implementation (Menu2) with MenuItemView.

views/controls/menu/menu_controller.cc

 // Copyright (c) 2011 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.
 
 #include "views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ skipping 740 matching lines @@
   size_t current_size = current_path.size();
   size_t new_size = new_path.size();
 
   if (pending_state_.item != menu_item && pending_state_.item) {
     View* current_hot_view = GetFirstHotTrackedView(pending_state_.item);
     if (current_hot_view)
       current_hot_view->SetHotTracked(false);
   }
 
   // Notify the old path it isn't selected.
-  for (size_t i = paths_differ_at; i < current_size; ++i)
+  MenuDelegate* current_delegate =
+      current_path.empty() ? NULL : current_path.front()->GetDelegate();
+  for (size_t i = paths_differ_at; i < current_size; ++i) {
+    if (current_delegate &&
+        current_path[i]->GetType() == MenuItemView::SUBMENU) {
+      current_delegate->WillHideMenu(current_path[i]);
+    }
     current_path[i]->SetSelected(false);
+  }
 
   // Notify the new path it is selected.
   for (size_t i = paths_differ_at; i < new_size; ++i)
     new_path[i]->SetSelected(true);
 
   if (menu_item && menu_item->GetDelegate())
     menu_item->GetDelegate()->SelectionChanged(menu_item);
 
   DCHECK(menu_item || (selection_types & SELECTION_EXIT) != 0);
 
@@ skipping 1089 matching lines @@
     return;
 
   // Reset the active_mouse_view_ before sending mouse capture lost. That way if
   // it calls back to us, we aren't in a weird state.
   View* active_view = active_mouse_view_;
   active_mouse_view_ = NULL;
   active_view->OnMouseCaptureLost();
 }
 
 }  // namespace views