Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/dom/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 40 matching lines @@
 
     if (!definition)
         return;
 
     // Upgrade elements that were waiting for this definition.
     const CustomElementUpgradeCandidateMap::ElementSet& upgradeCandidates = m_candidates.takeUpgradeCandidatesFor(definition->descriptor());
     for (CustomElementUpgradeCandidateMap::ElementSet::const_iterator it = upgradeCandidates.begin(); it != upgradeCandidates.end(); ++it)
         didResolveElement(definition, *it);
 }
 
-PassRefPtr<Element> CustomElementRegistrationContext::createCustomTagElement(Document* document, const QualifiedName& tagName, CreationMode mode)
+PassRefPtr<Element> CustomElementRegistrationContext::createCustomTagElement(Document& document, const QualifiedName& tagName, CreationMode mode)
 {
     ASSERT(CustomElement::isValidName(tagName.localName()));
 
-    if (!document)
-        return 0;
-
     RefPtr<Element> element;
 
     if (HTMLNames::xhtmlNamespaceURI == tagName.namespaceURI()) {
         element = HTMLElement::create(tagName, document);
     } else if (SVGNames::svgNamespaceURI == tagName.namespaceURI()) {
         element = SVGUnknownElement::create(tagName, document);
     } else {
         // XML elements are not custom elements, so return early.
-        return Element::create(tagName, document);
+        return Element::create(tagName, &document);
     }
 
     element->setCustomElementState(mode == CreatedByParser ? Element::WaitingForParser : Element::WaitingForUpgrade);
     resolve(element.get(), nullAtom);
     return element.release();
 }
 
 void CustomElementRegistrationContext::didGiveTypeExtension(Element* element, const AtomicString& type)
 {
     resolve(element, type);
@@ skipping 57 matching lines @@
     // Custom tags take precedence over type extensions
     ASSERT(!CustomElement::isValidName(element->localName()));
 
     element->setCustomElementState(mode == CreatedByParser ? Element::WaitingForParser : Element::WaitingForUpgrade);
 
     if (CustomElementRegistrationContext* context = element->document().registrationContext())
         context->didGiveTypeExtension(element, type);
 }
 
 } // namespace WebCore