Remove the Pagination struct, clean up viewport scroll policy propagation.

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 766 matching lines @@
 
     // Checks to make sure prefix and namespace do not conflict (per DOM Core 3)
     static bool hasValidNamespaceForElements(const QualifiedName&);
     static bool hasValidNamespaceForAttributes(const QualifiedName&);
 
     HTMLElement* body() const;
     void setBody(PassRefPtr<HTMLElement>, ExceptionState&);
 
     HTMLHeadElement* head();
 
+    Element* viewportDefiningElement() const;
+
     DocumentMarkerController* markers() const { return m_markers.get(); }
 
     bool directionSetOnDocumentElement() const { return m_directionSetOnDocumentElement; }
     bool writingModeSetOnDocumentElement() const { return m_writingModeSetOnDocumentElement; }
     void setDirectionSetOnDocumentElement(bool b) { m_directionSetOnDocumentElement = b; }
     void setWritingModeSetOnDocumentElement(bool b) { m_writingModeSetOnDocumentElement = b; }
 
     bool execCommand(const String& command, bool userInterface = false, const String& value = String());
     bool queryCommandEnabled(const String& command);
     bool queryCommandIndeterm(const String& command);
@@ skipping 594 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h