Make ELineBreak an enum class.

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

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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.
  *
@@ skipping 65 matching lines @@
       visited_link_text_stroke_color_is_current_color_(true),
       visited_link_text_fill_color_is_current_color_(true),
       visited_link_text_emphasis_color_is_current_color_(true),
       visited_link_caret_color_is_current_color_(false),
       visited_link_caret_color_is_auto_(true),
       text_security_(
           static_cast<unsigned>(ComputedStyle::InitialTextSecurity())),
       user_modify_(READ_ONLY),
       word_break_(ComputedStyle::InitialWordBreak()),
       overflow_wrap_(ComputedStyle::InitialOverflowWrap()),
-      line_break_(kLineBreakAuto),
+      line_break_(static_cast<unsigned>(LineBreak::kAuto)),
       user_select_(ComputedStyle::InitialUserSelect()),
       speak_(kSpeakNormal),
       hyphens_(kHyphensManual),
       text_emphasis_fill_(kTextEmphasisFillFilled),
       text_emphasis_mark_(kTextEmphasisMarkNone),
       text_emphasis_position_(kTextEmphasisPositionOver),
       text_align_last_(ComputedStyle::InitialTextAlignLast()),
       text_justify_(ComputedStyle::InitialTextJustify()),
       text_orientation_(kTextOrientationMixed),
       text_combine_(ComputedStyle::InitialTextCombine()),
@@ skipping 164 matching lines @@
     const StyleRareInheritedData& o) const {
   return DataEquivalent(text_shadow_, o.text_shadow_);
 }
 
 bool StyleRareInheritedData::QuotesDataEquivalent(
     const StyleRareInheritedData& o) const {
   return DataEquivalent(quotes_, o.quotes_);
 }
 
 }  // namespace blink