Have DOMPatchSupport and DocumentFragment deal with Document references

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 776 matching lines @@
     executeScriptsWaitingForResourcesIfNeeded();
 }
 
 bool Document::haveImportsLoaded() const
 {
     return !m_import || !m_import->isBlocked();
 }
 
 PassRefPtr<DocumentFragment> Document::createDocumentFragment()
 {
-    return DocumentFragment::create(&document());
+    return DocumentFragment::create(document());
 }
 
 PassRefPtr<Text> Document::createTextNode(const String& data)
 {
     return Text::create(this, data);
 }
 
 PassRefPtr<Comment> Document::createComment(const String& data)
 {
     return Comment::create(this, data);
@@ skipping 4533 matching lines @@
 {
     AtomicString localeKey = locale;
     if (locale.isEmpty() || !RuntimeEnabledFeatures::langAttributeAwareFormControlUIEnabled())
         localeKey = defaultLanguage();
     LocaleIdentifierToLocaleMap::AddResult result = m_localeCache.add(localeKey, nullptr);
     if (result.isNewEntry)
         result.iterator->value = Locale::create(localeKey);
     return *(result.iterator->value);
 }
 
-Document* Document::ensureTemplateDocument()
+Document& Document::ensureTemplateDocument()
 {
     if (const Document* document = templateDocument())
-        return const_cast<Document*>(document);
+        return *const_cast<Document*>(document);
 
     if (isHTMLDocument()) {
         DocumentInit init = DocumentInit::fromContext(contextDocument(), blankURL())
             .withRegistrationContext(registrationContext());
         m_templateDocument = HTMLDocument::create(init);
     } else {
         m_templateDocument = Document::create(DocumentInit(blankURL()));
     }
 
     m_templateDocument->setTemplateDocumentHost(this); // balanced in dtor.
 
-    return m_templateDocument.get();
+    return *m_templateDocument.get();
 }
 
 PassRefPtr<FontLoader> Document::fontloader()
 {
     if (!m_fontloader)
         m_fontloader = FontLoader::create(this);
     return m_fontloader;
 }
 
 void Document::didAssociateFormControl(Element* element)
@@ skipping 22 matching lines @@
 {
     return DocumentLifecycleNotifier::create(this);
 }
 
 DocumentLifecycleNotifier* Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier*>(ScriptExecutionContext::lifecycleNotifier());
 }
 
 } // namespace WebCore