*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/rendering/line/LineLayoutState.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2014 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 17 matching lines @@
 #include "platform/geometry/LayoutRect.h"
 
 namespace WebCore {
 
 class RenderBlockFlow;
 
 // Like LayoutState for layout(), LineLayoutState keeps track of global information
 // during an entire linebox tree layout pass (aka layoutInlineChildren).
 class LineLayoutState {
 public:
-    LineLayoutState(bool fullLayout, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom, RenderFlowThread* flowThread)
+    LineLayoutState(bool fullLayout, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom)
         : m_lastFloat(0)
         , m_endLine(0)
         , m_floatIndex(0)
         , m_endLineLogicalTop(0)
         , m_endLineMatched(false)
         , m_checkForFloatsFromLastLine(false)
         , m_isFullLayout(fullLayout)
         , m_repaintLogicalTop(repaintLogicalTop)
         , m_repaintLogicalBottom(repaintLogicalBottom)
         , m_adjustedLogicalLineTop(0)
         , m_usesRepaintBounds(false)
-        , m_flowThread(flowThread)
     { }
 
     void markForFullLayout() { m_isFullLayout = true; }
     bool isFullLayout() const { return m_isFullLayout; }
 
     bool usesRepaintBounds() const { return m_usesRepaintBounds; }
 
     void setRepaintRange(LayoutUnit logicalHeight)
     {
         m_usesRepaintBounds = true;
@@ skipping 26 matching lines @@
     void setLastFloat(FloatingObject* lastFloat) { m_lastFloat = lastFloat; }
 
     Vector<RenderBlockFlow::FloatWithRect>& floats() { return m_floats; }
 
     unsigned floatIndex() const { return m_floatIndex; }
     void setFloatIndex(unsigned floatIndex) { m_floatIndex = floatIndex; }
 
     LayoutUnit adjustedLogicalLineTop() const { return m_adjustedLogicalLineTop; }
     void setAdjustedLogicalLineTop(LayoutUnit value) { m_adjustedLogicalLineTop = value; }
 
-    RenderFlowThread* flowThread() const { return m_flowThread; }
-    void setFlowThread(RenderFlowThread* thread) { m_flowThread = thread; }
-
 private:
     Vector<RenderBlockFlow::FloatWithRect> m_floats;
     FloatingObject* m_lastFloat;
     RootInlineBox* m_endLine;
     LineInfo m_lineInfo;
     unsigned m_floatIndex;
     LayoutUnit m_endLineLogicalTop;
     bool m_endLineMatched;
     bool m_checkForFloatsFromLastLine;
 
     bool m_isFullLayout;
 
     // FIXME: Should this be a range object instead of two ints?
     LayoutUnit& m_repaintLogicalTop;
     LayoutUnit& m_repaintLogicalBottom;
 
     LayoutUnit m_adjustedLogicalLineTop;
 
     bool m_usesRepaintBounds;
-
-    RenderFlowThread* m_flowThread;
 };
 
 }
 
 #endif // LineLayoutState_h