Have SelectorQuery API take rootNode by reference

Source/core/dom/StyleSheetScopingNodeList.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) 2013 Google Inc. All rights reserved.
  *
@@ skipping 21 matching lines @@
 #include "wtf/FastAllocBase.h"
 #include "wtf/ListHashSet.h"
 
 namespace WebCore {
 
 inline bool isTreeScopeRoot(const Node* node)
 {
     return !node || node->isDocumentNode() || node->isShadowRoot();
 }
 
+inline bool isTreeScopeRoot(const Node& node)
+{
+    return node.isDocumentNode() || node.isShadowRoot();
+}
+
 class StyleSheetScopingNodeList {
     WTF_MAKE_NONCOPYABLE(StyleSheetScopingNodeList); WTF_MAKE_FAST_ALLOCATED;
 public:
     StyleSheetScopingNodeList() { }
 
     void add(ContainerNode*);
     void remove(ContainerNode*);
     void clear()
     {
         m_scopingNodes.clear();
@@ skipping 11 matching lines @@
     ListHashSet<Node*, 4>* scopingNodesRemoved() { return m_scopingNodesRemoved.get(); }
 
 private:
     OwnPtr<DocumentOrderedList> m_scopingNodes;
     OwnPtr<ListHashSet<Node*, 4> > m_scopingNodesRemoved;
 };
 
 }
 
 #endif