Make EFlexWrap an enum class.

third_party/WebKit/Source/core/layout/FlexibleBoxAlgorithm.h

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 75 matching lines @@
   // according to its min and max main size properties
   bool ComputeNextFlexLine(size_t& next_index,
                            Vector<FlexItem>& line_items,
                            LayoutUnit& sum_flex_base_size,
                            double& total_flex_grow,
                            double& total_flex_shrink,
                            double& total_weighted_flex_shrink,
                            LayoutUnit& sum_hypothetical_main_size);
 
  private:
-  bool IsMultiline() const { return style_->FlexWrap() != kFlexNoWrap; }
+  bool IsMultiline() const { return style_->FlexWrap() != EFlexWrap::kNowrap; }
 
   const ComputedStyle* style_;
   LayoutUnit line_break_length_;
   const Vector<FlexItem>& all_items_;
 };
 
 }  // namespace blink
 
 #endif  // FlexibleBoxAlgorithm_h