Move m_pageLogicalOffset from LayoutBlock to LayoutBoxRareData.

Source/core/layout/LayoutBlock.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 182 matching lines @@
 
     virtual LayoutBox* createAnonymousBoxWithSameTypeAs(const LayoutObject* parent) const override;
 
     ColumnInfo* columnInfo() const;
     int columnGap() const;
 
     // These two functions take the ColumnInfo* to avoid repeated lookups of the info in the global HashMap.
     unsigned columnCount(ColumnInfo*) const;
     LayoutRect columnRectAt(ColumnInfo*, unsigned) const;
 
-    // The page logical offset is the object's offset from the top of the page in the page progression
-    // direction (so an x-offset in vertical text and a y-offset for horizontal text).
-    LayoutUnit pageLogicalOffset() const { return m_pageLogicalOffset; }
-    void setPageLogicalOffset(LayoutUnit offset) { m_pageLogicalOffset = offset; }
-
     // Accessors for logical width/height and margins in the containing block's block-flow direction.
     LayoutUnit logicalWidthForChild(const LayoutBox& child) const { return isHorizontalWritingMode() ? child.size().width() : child.size().height(); }
     LayoutUnit logicalHeightForChild(const LayoutBox& child) const { return isHorizontalWritingMode() ? child.size().height() : child.size().width(); }
     LayoutSize logicalSizeForChild(const LayoutBox& child) const { return isHorizontalWritingMode() ? child.size() : child.size().transposedSize(); }
     LayoutUnit logicalTopForChild(const LayoutBox& child) const { return isHorizontalWritingMode() ? child.location().y() : child.location().x(); }
     LayoutUnit marginBeforeForChild(const LayoutBoxModelObject& child) const { return child.marginBefore(style()); }
     LayoutUnit marginAfterForChild(const LayoutBoxModelObject& child) const { return child.marginAfter(style()); }
     LayoutUnit marginStartForChild(const LayoutBoxModelObject& child) const { return child.marginStart(style()); }
     LayoutUnit marginEndForChild(const LayoutBoxModelObject& child) const { return child.marginEnd(style()); }
     void setMarginStartForChild(LayoutBox& child, LayoutUnit value) const { child.setMarginStart(value, style()); }
@@ skipping 231 matching lines @@
 
     virtual bool canCollapseAnonymousBlockChild() const { return true; }
 
 public:
     virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const override final;
 
 protected:
     LayoutObjectChildList m_children;
     LineBoxList m_lineBoxes; // All of the root line boxes created for this block flow.  For example, <div>Hello<br>world.</div> will have two total lines for the <div>.
 
-    LayoutUnit m_pageLogicalOffset;
-
     unsigned m_hasMarginBeforeQuirk : 1; // Note these quirk values can't be put in LayoutBlockRareData since they are set too frequently.
     unsigned m_hasMarginAfterQuirk : 1;
     unsigned m_beingDestroyed : 1;
     unsigned m_hasMarkupTruncation : 1;
     unsigned m_widthAvailableToChildrenChanged  : 1;
     mutable unsigned m_hasOnlySelfCollapsingChildren : 1;
     mutable unsigned m_descendantsWithFloatsMarkedForLayout : 1;
 
     // LayoutRubyBase objects need to be able to split and merge, moving their children around
     // (calling moveChildTo, moveAllChildrenTo, and makeChildrenNonInline).
     friend class LayoutRubyBase;
     // FIXME-BLOCKFLOW: Remove this when the line layout stuff has all moved out of LayoutBlock
     friend class LineBreaker;
 
     // FIXME: This is temporary as we move code that accesses block flow
     // member variables out of LayoutBlock and into LayoutBlockFlow.
     friend class LayoutBlockFlow;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlock, isLayoutBlock());
 
 } // namespace blink
 
 #endif // LayoutBlock_h