Allow menus to stay open during a child view's drag and drop

ui/views/controls/menu/menu_delegate.cc

 // Copyright (c) 2012 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 "ui/views/controls/menu/menu_delegate.h"
 
 #include "ui/events/event.h"
 #include "ui/views/controls/menu/menu_config.h"
 
 namespace views {
@@ skipping 54 matching lines @@
 }
 
 bool MenuDelegate::GetContextualLabel(int id, base::string16* out) const {
   return false;
 }
 
 bool MenuDelegate::ShouldCloseAllMenusOnExecute(int id) {
   return true;
 }
 
+bool MenuDelegate::ShouldCloseOnDragComplete() {
+  return true;
+}
+
 void MenuDelegate::ExecuteCommand(int id, int mouse_event_flags) {
   ExecuteCommand(id);
 }
 
 bool MenuDelegate::ShouldExecuteCommandWithoutClosingMenu(int id,
                                                           const ui::Event& e) {
   return false;
 }
 
 bool MenuDelegate::IsTriggerableEvent(MenuItemView* source,
@@ skipping 72 matching lines @@
                                             int* right_margin) const {
   *left_margin = 0;
   *right_margin = 0;
 }
 
 bool MenuDelegate::ShouldReserveSpaceForSubmenuIndicator() const {
   return true;
 }
 
 }  // namespace views