Make ETextSecurity an enum class.

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

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2009, 2013 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 189 matching lines @@
   // True if we have inline text box children which implies rendered text (or
   // whitespace) output.
   bool HasTextBoxes() const { return FirstTextBox(); }
 
   int CaretMinOffset() const override;
   int CaretMaxOffset() const override;
   unsigned ResolvedTextLength() const;
 
   bool ContainsReversedText() const { return contains_reversed_text_; }
 
-  bool IsSecure() const { return Style()->TextSecurity() != TSNONE; }
+  bool IsSecure() const {
+    return Style()->TextSecurity() != ETextSecurity::kNone;
+  }
   void MomentarilyRevealLastTypedCharacter(
       unsigned last_typed_character_offset);
 
   bool IsAllCollapsibleWhitespace() const;
   bool IsRenderedCharacter(int offset_in_node) const;
 
   void RemoveAndDestroyTextBoxes();
 
   PassRefPtr<AbstractInlineTextBox> FirstAbstractInlineTextBox();
 
@@ skipping 136 matching lines @@
 
 inline LayoutText* Text::GetLayoutObject() const {
   return ToLayoutText(CharacterData::GetLayoutObject());
 }
 
 void ApplyTextTransform(const ComputedStyle*, String&, UChar);
 
 }  // namespace blink
 
 #endif  // LayoutText_h