Implement checked attribute for menuitem.

Source/core/page/CustomContextMenuProvider.cpp

 // Copyright 2014 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 "config.h"
 #include "core/page/CustomContextMenuProvider.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/events/EventDispatcher.h"
@@ skipping 62 matching lines @@
 }
 
 void CustomContextMenuProvider::appendMenuItem(HTMLMenuItemElement* menuItem, ContextMenu& contextMenu)
 {
     // Avoid menuitems with no label.
     String labelString = menuItem->fastGetAttribute(labelAttr);
     if (labelString.isEmpty())
         return;
 
     m_menuItems.append(menuItem);
-    contextMenu.appendItem(ContextMenuItem(ActionType, static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + m_menuItems.size() - 1), labelString, !menuItem->fastHasAttribute(disabledAttr), false));
+
+    bool enabled = !menuItem->fastHasAttribute(disabledAttr);
+    ContextMenuAction action = static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + m_menuItems.size() - 1);
+    if (equalIgnoringCase(menuItem->fastGetAttribute(typeAttr), "checkbox"))
+        contextMenu.appendItem(ContextMenuItem(CheckableActionType, action, labelString, enabled, menuItem->fastHasAttribute(checkedAttr)));
+    else
+        contextMenu.appendItem(ContextMenuItem(ActionType, action, labelString, enabled, false));
 }
 
 void CustomContextMenuProvider::populateContextMenuItems(const HTMLMenuElement& menu, ContextMenu& contextMenu)
 {
     HTMLElement* nextElement = Traversal<HTMLElement>::firstWithin(menu);
     while (nextElement) {
         if (isHTMLHRElement(*nextElement)) {
             appendSeparator(contextMenu);
             nextElement = Traversal<HTMLElement>::next(*nextElement, &menu);
         } else if (isHTMLMenuElement(*nextElement)) {
@@ skipping 25 matching lines @@
 
 HTMLElement* CustomContextMenuProvider::menuItemAt(unsigned menuId)
 {
     int itemIndex = menuId - ContextMenuItemBaseCustomTag;
     if (itemIndex < 0 || static_cast<unsigned long>(itemIndex) >= m_menuItems.size())
         return nullptr;
     return m_menuItems[itemIndex].get();
 }
 
 } // namespace blink