Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/bookmarks/bookmark_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 "chrome/browser/ui/views/bookmarks/bookmark_menu_delegate.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/bookmarks/managed_bookmark_service_factory.h"
@@ skipping 159 matching lines @@
   chrome::OpenAll(parent_->GetNativeWindow(), page_navigator_, selection,
                   ui::DispositionFromEventFlags(mouse_event_flags),
                   profile_);
   // NOTE: |this| may be deleted.
 }
 
 bool BookmarkMenuDelegate::ShouldExecuteCommandWithoutClosingMenu(
     int id,
     const ui::Event& event) {
   return (event.flags() & ui::EF_LEFT_MOUSE_BUTTON) &&
-         ui::DispositionFromEventFlags(event.flags()) == NEW_BACKGROUND_TAB;
+         ui::DispositionFromEventFlags(event.flags()) ==
+             WindowOpenDisposition::NEW_BACKGROUND_TAB;
 }
 
 bool BookmarkMenuDelegate::GetDropFormats(
     MenuItemView* menu,
     int* formats,
     std::set<ui::Clipboard::FormatType>* format_types) {
   *formats = ui::OSExchangeData::URL;
   format_types->insert(BookmarkNodeData::GetBookmarkFormatType());
   return true;
 }
@@ skipping 353 matching lines @@
     }
     AddMenuToMaps(child_menu_item, node);
   }
 }
 
 void BookmarkMenuDelegate::AddMenuToMaps(MenuItemView* menu,
                                          const BookmarkNode* node) {
   menu_id_to_node_map_[menu->GetCommand()] = node;
   node_to_menu_map_[node] = menu;
 }