Make EUserSelect 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 66 matching lines @@
       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_(static_cast<unsigned>(EUserModify::kReadOnly)),
       word_break_(ComputedStyle::InitialWordBreak()),
       overflow_wrap_(ComputedStyle::InitialOverflowWrap()),
       line_break_(static_cast<unsigned>(LineBreak::kAuto)),
-      user_select_(ComputedStyle::InitialUserSelect()),
+      user_select_(static_cast<unsigned>(ComputedStyle::InitialUserSelect())),
       speak_(static_cast<unsigned>(ESpeak::kNormal)),
       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()),
       text_indent_line_(ComputedStyle::InitialTextIndentLine()),
@@ skipping 80 matching lines @@
          text_decoration_skip_ == o.text_decoration_skip_ &&
          ruby_position_ == o.ruby_position_ &&
          DataEquivalent(list_style_image_, o.list_style_image_) &&
          DataEquivalent(applied_text_decorations_,
                         o.applied_text_decorations_) &&
          DataEquivalent(variables_, o.variables_) &&
          text_size_adjust_ == o.text_size_adjust_;
 }
 
 }  // namespace blink