Make SelectionState enum class

third_party/WebKit/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 32 matching lines @@
                   first_line,
                   true,
                   false,
                   false,
                   is_vertical,
                   0,
                   0,
                   parent),
         height_(height),
         str_(ellipsis_str),
-        selection_state_(SelectionNone) {
+        selection_state_(SelectionState::kNone) {
     SetHasVirtualLogicalHeight();
   }
 
   void Paint(const PaintInfo&,
              const LayoutPoint&,
              LayoutUnit line_top,
              LayoutUnit line_bottom) const override;
   bool NodeAtPoint(HitTestResult&,
                    const HitTestLocation& location_in_container,
                    const LayoutPoint& accumulated_offset,
@@ skipping 10 matching lines @@
 
  private:
   LayoutUnit height_;
   AtomicString str_;
   SelectionState selection_state_;
 };
 
 }  // namespace blink
 
 #endif  // EllipsisBox_h