Remove legacy markup box behavior when line-clamping.

Source/core/layout/line/EllipsisBox.h

 /**
  * Copyright (C) 2003, 2006 Apple Computer, Inc.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 13 matching lines @@
 #include "core/layout/line/InlineBox.h"
 
 namespace blink {
 
 class HitTestRequest;
 class HitTestResult;
 
 class EllipsisBox final : public InlineBox {
 public:
     EllipsisBox(LayoutObject& obj, const AtomicString& ellipsisStr, InlineFlowBox* parent,
-        int width, int height, int x, int y, bool firstLine, bool isVertical, InlineBox* markupBox)
+        int width, int height, int x, int y, bool firstLine, bool isVertical)
         : InlineBox(obj, FloatPointWillBeLayoutPoint(x, y), width, firstLine, true, false, false, isVertical, 0, 0, parent)
-        , m_shouldPaintMarkupBox(markupBox)
         , m_height(height)
         , m_str(ellipsisStr)
         , m_selectionState(LayoutObject::SelectionNone)
     {
         setHasVirtualLogicalHeight();
     }
 
     virtual void paint(const PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
     virtual bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) override;
     void setSelectionState(LayoutObject::SelectionState s) { m_selectionState = s; }
     IntRect selectionRect();
 
     virtual FloatWillBeLayoutUnit virtualLogicalHeight() const override { return m_height; }
     virtual LayoutObject::SelectionState selectionState() const override { return m_selectionState; }
     const AtomicString& ellipsisStr() { return m_str; }
-    InlineBox* markupBox() const;
 
     virtual const char* boxName() const override;
 
 private:
 
-    bool m_shouldPaintMarkupBox;
     int m_height;
     AtomicString m_str;
     LayoutObject::SelectionState m_selectionState;
 };
 
 } // namespace blink
 
 #endif // EllipsisBox_h