Make EBorderStyle an enum class.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.cpp

 /*
  * Copyright (C) 2012 Apple Inc.  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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 550 matching lines @@
     Vector<LayoutRect>& column_rule_bounds) const {
   if (FlowThread()->IsLayoutPagedFlowThread())
     return false;
 
   // Reference: https://www.w3.org/TR/css3-multicol/#column-gaps-and-rules
   const ComputedStyle& block_style = MultiColumnBlockFlow()->StyleRef();
   bool rule_transparent = block_style.ColumnRuleIsTransparent();
   EBorderStyle rule_style = block_style.ColumnRuleStyle();
   LayoutUnit rule_thickness(block_style.ColumnRuleWidth());
   LayoutUnit col_gap = ColumnGap();
-  bool render_rule = rule_style > kBorderStyleHidden && !rule_transparent;
+  bool render_rule = rule_style > EBorderStyle::kHidden && !rule_transparent;
   if (!render_rule)
     return false;
 
   unsigned col_count = ActualColumnCount();
   if (col_count <= 1)
     return false;
 
   bool left_to_right = Style()->IsLeftToRightDirection();
   LayoutUnit curr_logical_left_offset =
       left_to_right ? LayoutUnit() : ContentLogicalWidth();
@@ skipping 44 matching lines @@
   // Now add in column rule bounds, if present.
   Vector<LayoutRect> column_rule_bounds;
   if (ComputeColumnRuleBounds(LayoutPoint(), column_rule_bounds)) {
     for (auto& bound : column_rule_bounds)
       block_flow_bounds.Unite(bound);
   }
   return block_flow_bounds;
 }
 
 }  // namespace blink