Use auto and Range-based loop interation in Source/core/dom/custom/

Source/core/dom/custom/CustomElementRegistrationContext.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 46 matching lines @@
 
     if (!definition)
         return;
 
     // Upgrade elements that were waiting for this definition.
     OwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap::ElementSet> upgradeCandidates = m_candidates->takeUpgradeCandidatesFor(definition->descriptor());
 
     if (!upgradeCandidates)
         return;
 
-    for (CustomElementUpgradeCandidateMap::ElementSet::const_iterator it = upgradeCandidates->begin(); it != upgradeCandidates->end(); ++it)
-        CustomElement::define(*it, definition);
+    for (const auto& candidate : *upgradeCandidates)
+        CustomElement::define(candidate, definition);
 }
 
 PassRefPtrWillBeRawPtr<Element> CustomElementRegistrationContext::createCustomTagElement(Document& document, const QualifiedName& tagName)
 {
     ASSERT(CustomElement::isValidName(tagName.localName()));
 
     RefPtrWillBeRawPtr<Element> element;
 
     if (HTMLNames::xhtmlNamespaceURI == tagName.namespaceURI()) {
         element = HTMLElement::create(tagName, document);
@@ skipping 75 matching lines @@
     element->setCustomElementState(Element::WaitingForUpgrade);
     context->didGiveTypeExtension(element, element->document().convertLocalName(type));
 }
 
 void CustomElementRegistrationContext::trace(Visitor* visitor)
 {
     visitor->trace(m_candidates);
 }
 
 } // namespace blink