Move SelectionState out of LayoutObject and into Line Layout API

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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef EllipsisBox_h
 #define EllipsisBox_h
 
+#include "core/layout/api/SelectionState.h"
 #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(obj, LayoutPoint(x, y), width, firstLine, true, false, false, isVertical, 0, 0, parent)
         , m_height(height)
         , m_str(ellipsisStr)
-        , m_selectionState(LayoutObject::SelectionNone)
+        , m_selectionState(SelectionNone)
     {
         setHasVirtualLogicalHeight();
     }
 
     void paint(const PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
     bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) override;
-    void setSelectionState(LayoutObject::SelectionState s) { m_selectionState = s; }
+    void setSelectionState(SelectionState s) { m_selectionState = s; }
     IntRect selectionRect();
 
     LayoutUnit virtualLogicalHeight() const override { return m_height; }
-    LayoutObject::SelectionState selectionState() const override { return m_selectionState; }
+    SelectionState selectionState() const override { return m_selectionState; }
     const AtomicString& ellipsisStr() { return m_str; }
 
     const char* boxName() const override;
 
 private:
 
     int m_height;
     AtomicString m_str;
-    LayoutObject::SelectionState m_selectionState;
+    SelectionState m_selectionState;
 };
 
 } // namespace blink
 
 #endif // EllipsisBox_h