Use C++11 features in core/html

Source/core/html/HTMLFormElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 772 matching lines @@
         return;
     if (!m_pastNamesMap)
         m_pastNamesMap = adoptPtrWillBeNoop(new PastNamesMap);
     m_pastNamesMap->set(pastName, element);
 }
 
 void HTMLFormElement::removeFromPastNamesMap(HTMLElement& element)
 {
     if (!m_pastNamesMap)
         return;
-    PastNamesMap::iterator end = m_pastNamesMap->end();
-    for (PastNamesMap::iterator it = m_pastNamesMap->begin(); it != end; ++it) {
-        if (it->value == &element) {
-            it->value = nullptr;
+    for (auto& it : *m_pastNamesMap) {
+        if (it.value == &element) {
+            it.value = nullptr;
             // Keep looping. Single element can have multiple names.
         }
     }
 }
 
 void HTMLFormElement::getNamedElements(const AtomicString& name, WillBeHeapVector<RefPtrWillBeMember<Element> >& namedItems)
 {
     // http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#dom-form-nameditem
     elements()->namedItems(name, namedItems);
 
@@ skipping 52 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace