Count 'icon' attribute of MENUITEM element.

third_party/WebKit/Source/core/html/HTMLMenuItemElement.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 "core/html/HTMLMenuItemElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/events/Event.h"
 #include "core/frame/UseCounter.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline HTMLMenuItemElement::HTMLMenuItemElement(Document& document)
     : HTMLElement(HTMLNames::menuitemTag, document) {
   UseCounter::count(document, UseCounter::MenuItemElement);
 }
 
 bool HTMLMenuItemElement::isURLAttribute(const Attribute& attribute) const {
   return attribute.name() == iconAttr || HTMLElement::isURLAttribute(attribute);
 }
 
+void HTMLMenuItemElement::parseAttribute(
+    const AttributeModificationParams& params) {
+  if (params.name == iconAttr)
+    UseCounter::count(document(), UseCounter::MenuItemElementIconAttribute);
+  HTMLElement::parseAttribute(params);
+}
+
 void HTMLMenuItemElement::defaultEventHandler(Event* event) {
   if (event->type() == EventTypeNames::click) {
     if (equalIgnoringCase(fastGetAttribute(typeAttr), "checkbox")) {
       if (fastHasAttribute(checkedAttr))
         removeAttribute(checkedAttr);
       else
         setAttribute(checkedAttr, "checked");
     } else if (equalIgnoringCase(fastGetAttribute(typeAttr), "radio")) {
       if (Element* parent = parentElement()) {
         AtomicString group = fastGetAttribute(radiogroupAttr);
         for (HTMLMenuItemElement& menuItem :
              Traversal<HTMLMenuItemElement>::childrenOf(*parent)) {
           if (!menuItem.fastHasAttribute(checkedAttr))
             continue;
           const AtomicString& groupAttr =
               menuItem.fastGetAttribute(radiogroupAttr);
           if (equalIgnoringNullity(groupAttr.impl(), group.impl()))
             menuItem.removeAttribute(checkedAttr);
         }
       }
       setAttribute(checkedAttr, "checked");
     }
     event->setDefaultHandled();
   }
 }
 
 DEFINE_NODE_FACTORY(HTMLMenuItemElement)
 
 }  // namespace blink