Remove unused methods and variables in RenderFlowThread.

Source/core/rendering/RenderFlowThread.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 62 matching lines @@
 
     virtual void updateLogicalWidth() OVERRIDE FINAL;
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
 
     bool hasRegions() const { return m_regionList.size(); }
 
     void validateRegions();
     void invalidateRegions();
     bool hasValidRegionInfo() const { return !m_regionsInvalidated && !m_regionList.isEmpty(); }
 
-    static PassRefPtr<RenderStyle> createFlowThreadStyle(RenderStyle* parentStyle);
-
     void repaintRectangleInRegions(const LayoutRect&) const;
 
     LayoutPoint adjustedPositionRelativeToOffsetParent(const RenderBoxModelObject&, const LayoutPoint&);
 
     LayoutUnit pageLogicalTopForOffset(LayoutUnit);
-    LayoutUnit pageLogicalWidthForOffset(LayoutUnit);
     LayoutUnit pageLogicalHeightForOffset(LayoutUnit);
     LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit, PageBoundaryRule = IncludePageBoundary);
 
     virtual void setPageBreak(LayoutUnit /*offset*/, LayoutUnit /*spaceShortage*/) { }
     virtual void updateMinimumPageHeight(LayoutUnit /*offset*/, LayoutUnit /*minHeight*/) { }
 
     enum RegionAutoGenerationPolicy {
         AllowRegionAutoGeneration,
         DisallowRegionAutoGeneration,
     };
     RenderRegion* regionAtBlockOffset(LayoutUnit, bool extendLastRegion = false, RegionAutoGenerationPolicy = AllowRegionAutoGeneration);
 
     bool regionsHaveUniformLogicalHeight() const { return m_regionsHaveUniformLogicalHeight; }
 
     RenderRegion* mapFromFlowToRegion(TransformState&) const;
 
     RenderRegion* firstRegion() const;
     RenderRegion* lastRegion() const;
 
-    bool previousRegionCountChanged() const { return m_previousRegionCount != m_regionList.size(); }
-    void updatePreviousRegionCount() { m_previousRegionCount = m_regionList.size(); }
-
     void setRegionRangeForBox(const RenderBox*, LayoutUnit offsetFromLogicalTopOfFirstPage);
     void getRegionRangeForBox(const RenderBox*, RenderRegion*& startRegion, RenderRegion*& endRegion) const;
 
     virtual bool addForcedRegionBreak(LayoutUnit, RenderObject* breakChild, bool isBefore, LayoutUnit* offsetBreakAdjustment = 0) { return false; }
     void applyBreakAfterContent(LayoutUnit);
 
     virtual bool isPageLogicalHeightKnown() const { return true; }
     bool pageLogicalSizeChanged() const { return m_pageLogicalSizeChanged; }
 
     void collectLayerFragments(LayerFragments&, const LayoutRect& layerBoundingBox, const LayoutRect& dirtyRect);
@@ skipping 20 matching lines @@
 
     virtual void autoGenerateRegionsToBlockOffset(LayoutUnit) { }
 
     bool cachedOffsetFromLogicalTopOfFirstRegion(const RenderBox*, LayoutUnit&) const;
     void setOffsetFromLogicalTopOfFirstRegion(const RenderBox*, LayoutUnit);
     void clearOffsetFromLogicalTopOfFirstRegion(const RenderBox*);
 
     const RenderBox* currentStatePusherRenderBox() const;
 
     RenderRegionList m_regionList;
-    unsigned short m_previousRegionCount;
 
     class RenderRegionRange {
     public:
         RenderRegionRange()
         {
             setRange(0, 0);
         }
 
         RenderRegionRange(RenderRegion* start, RenderRegion* end)
         {
@@ skipping 73 matching lines @@
 };
 
 template <> struct ValueToString<RenderRegion*> {
     static String string(const RenderRegion* value) { return String::format("%p", value); }
 };
 #endif
 
 } // namespace WebCore
 
 #endif // RenderFlowThread_h