Move m_pageLogicalOffset from LayoutBlock to LayoutBoxRareData.

Source/core/layout/LayoutBlock.cpp

 /*
  * 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, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 63 matching lines @@
 using namespace WTF;
 using namespace Unicode;
 
 namespace blink {
 
 using namespace HTMLNames;
 
 struct SameSizeAsLayoutBlock : public LayoutBox {
     LayoutObjectChildList children;
     LineBoxList lineBoxes;
-    int pageLogicalOffset;
     uint32_t bitfields;
 };
 
 static_assert(sizeof(LayoutBlock) == sizeof(SameSizeAsLayoutBlock), "LayoutBlock should stay small");
 
 typedef WTF::HashMap<const LayoutBox*, OwnPtr<ColumnInfo>> ColumnInfoMap;
 static ColumnInfoMap* gColumnInfoMap = 0;
 
 static TrackedDescendantsMap* gPositionedDescendantsMap = 0;
 static TrackedDescendantsMap* gPercentHeightDescendantsMap = 0;
@@ skipping 3826 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink