Make EUserSelect an enum class.

third_party/WebKit/Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 1970 matching lines @@
   // -webkit-user-modify
   static EUserModify InitialUserModify() { return EUserModify::kReadOnly; }
   EUserModify UserModify() const {
     return static_cast<EUserModify>(rare_inherited_data_->user_modify_);
   }
   void SetUserModify(EUserModify u) {
     SET_VAR(rare_inherited_data_, user_modify_, static_cast<unsigned>(u));
   }
 
   // -webkit-user-select
-  static EUserSelect InitialUserSelect() { return SELECT_TEXT; }
+  static EUserSelect InitialUserSelect() { return EUserSelect::kText; }
   EUserSelect UserSelect() const {
     return static_cast<EUserSelect>(rare_inherited_data_->user_select_);
   }
   void SetUserSelect(EUserSelect s) {
-    SET_VAR(rare_inherited_data_, user_select_, s);
+    SET_VAR(rare_inherited_data_, user_select_, static_cast<unsigned>(s));
   }
 
   // caret-color
   void SetCaretColor(const StyleAutoColor& color) {
     SET_VAR(rare_inherited_data_, caret_color_, color.Resolve(Color()));
     SET_VAR(rare_inherited_data_, caret_color_is_current_color_,
             color.IsCurrentColor());
     SET_VAR(rare_inherited_data_, caret_color_is_auto_, color.IsAutoColor());
   }
 
@@ skipping 1791 matching lines @@
       PseudoBitsInternal() | 1 << (pseudo - kFirstPublicPseudoId)));
 }
 
 inline bool ComputedStyle::HasPseudoElementStyle() const {
   return PseudoBitsInternal() & kElementPseudoIdMask;
 }
 
 }  // namespace blink
 
 #endif  // ComputedStyle_h