Move m_pageLogicalOffset from LayoutBlock to LayoutBoxRareData.

Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 4636 matching lines @@
     if (layoutState && !layoutState->isPaginated())
         return LayoutUnit();
 
     if (!layoutState && !flowThreadContainingBlock())
         return LayoutUnit();
 
     LayoutBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
+void LayoutBox::setPageLogicalOffset(LayoutUnit offset)
+{
+    if (!m_rareData && !offset)
+        return;
+    ensureRareData().m_pageLogicalOffset = offset;
+}
+
 void LayoutBox::savePreviousBorderBoxSizeIfNeeded()
 {
     // If m_rareData is already created, always save.
     if (!m_rareData) {
         LayoutSize paintInvalidationSize = previousPaintInvalidationRect().size();
 
         // Don't save old border box size if the paint rect is empty because we'll
         // full invalidate once the paint rect becomes non-empty.
         if (paintInvalidationSize.isEmpty())
             return;
@@ skipping 127 matching lines @@
 bool LayoutBox::canRenderBorderImage() const
 {
     if (!style()->hasBorder())
         return false;
 
     StyleImage* borderImage = style()->borderImage().image();
     return borderImage && borderImage->canRender(*this, style()->effectiveZoom()) && borderImage->isLoaded();
 }
 
 } // namespace blink