Make EBoxDecorationBreak an enum class.

third_party/WebKit/Source/core/style/StyleBoxData.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * 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,
@@ skipping 24 matching lines @@
               "StyleBoxData should stay small");
 
 StyleBoxData::StyleBoxData()
     : min_width_(ComputedStyle::InitialMinWidth()),
       max_width_(ComputedStyle::InitialMaxWidth()),
       min_height_(ComputedStyle::InitialMinHeight()),
       max_height_(ComputedStyle::InitialMaxHeight()),
       z_index_(0),
       has_auto_z_index_(true),
       box_sizing_(static_cast<unsigned>(ComputedStyle::InitialBoxSizing())),
-      box_decoration_break_(kBoxDecorationBreakSlice) {}
+      box_decoration_break_(
+          static_cast<unsigned>(EBoxDecorationBreak::kSlice)) {}
 
 bool StyleBoxData::operator==(const StyleBoxData& o) const {
   return width_ == o.width_ && height_ == o.height_ &&
          min_width_ == o.min_width_ && max_width_ == o.max_width_ &&
          min_height_ == o.min_height_ && max_height_ == o.max_height_ &&
          vertical_align_length_ == o.vertical_align_length_ &&
          z_index_ == o.z_index_ && has_auto_z_index_ == o.has_auto_z_index_ &&
          box_sizing_ == o.box_sizing_ &&
          box_decoration_break_ == o.box_decoration_break_;
 }
 
 }  // namespace blink