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

Source/core/rendering/RenderBlock.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 549 matching lines @@
     // Adjust from painting offsets to the local coords of this renderer
     void offsetForContents(LayoutPoint&) const;
 
     // This function is called to test a line box that has moved in the block direction to see if it has ended up in a new
     // region/page/column that has a different available line width than the old one. Used to know when you have to dirty a
     // line, i.e., that it can't be re-used.
     bool lineWidthForPaginatedLineChanged(RootInlineBox*, LayoutUnit lineDelta, RenderFlowThread*) const;
 
     bool logicalWidthChangedInRegions(RenderFlowThread*) const;
 
-    virtual bool requiresColumns(int desiredColumnCount) const;
+    bool requiresColumns(int desiredColumnCount) const;
 
     virtual bool updateLogicalWidthAndColumnWidth();
 
     virtual bool canCollapseAnonymousBlockChild() const { return true; }
 
 public:
     virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const OVERRIDE FINAL;
     RenderRegion* regionAtBlockOffset(LayoutUnit) const;
     RenderRegion* clampToStartAndEndRegions(RenderRegion*) const;
 
@@ skipping 56 matching lines @@
             return false;
     }
     return true;
 }
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBlock, isRenderBlock());
 
 } // namespace WebCore
 
 #endif // RenderBlock_h