Have Document::mediaQueryMatcher() / Document::selectorQueryCache() return references

Source/core/dom/Document.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 206 matching lines @@
     static PassRefPtr<Document> create(const DocumentInit& initializer = DocumentInit())
     {
         return adoptRef(new Document(initializer));
     }
     static PassRefPtr<Document> createXHTML(const DocumentInit& initializer = DocumentInit())
     {
         return adoptRef(new Document(initializer, XHTMLDocumentClass));
     }
     virtual ~Document();
 
-    MediaQueryMatcher* mediaQueryMatcher();
+    MediaQueryMatcher& mediaQueryMatcher();
 
     using ContainerNode::ref;
     using ContainerNode::deref;
     using SecurityContext::securityOrigin;
     using SecurityContext::contentSecurityPolicy;
 
     virtual bool canContainRangeEndPoint() const { return true; }
 
-    SelectorQueryCache* selectorQueryCache();
+    SelectorQueryCache& selectorQueryCache();
 
     // DOM methods & attributes for Document
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(beforecopy);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(beforecut);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(beforepaste);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(blur);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(cancel);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(canplay);
@@ skipping 1201 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == documentInternal();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h