Clean up StyleInheritedData.

third_party/WebKit/Source/core/style/StyleInheritedData.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 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
  * License as published by the Free Software Foundation; either
@@ skipping 19 matching lines @@
 #include "platform/fonts/Font.h"
 #include "platform/graphics/Color.h"
 #include "platform/wtf/PassRefPtr.h"
 #include "platform/wtf/RefCounted.h"
 
 namespace blink {
 
 // TODO(sashab): Move this into a private class on ComputedStyle, and remove
 // all methods on it, merging them into copy/creation methods on ComputedStyle
 // instead. Keep the allocation logic, only allocating a new object if needed.
-class CORE_EXPORT StyleInheritedData : public RefCounted<StyleInheritedData> {
+class CORE_EXPORT StyleInheritedData
+    : public RefCountedCopyable<StyleInheritedData> {
  public:
   static PassRefPtr<StyleInheritedData> Create() {
     return AdoptRef(new StyleInheritedData);
   }
   PassRefPtr<StyleInheritedData> Copy() const {
     return AdoptRef(new StyleInheritedData(*this));
   }
-  ~StyleInheritedData();
 
   bool operator==(const StyleInheritedData&) const;
   bool operator!=(const StyleInheritedData& o) const { return !(*this == o); }
 
   short horizontal_border_spacing_;
   short vertical_border_spacing_;
 
   // could be packed in a short but doesn't
   // make a difference currently because of padding
   Length line_height_;
 
   Font font_;
   Color color_;
   Color visited_link_color_;
   float text_autosizing_multiplier_;
 
  private:
   StyleInheritedData();
-  StyleInheritedData(const StyleInheritedData&);
+  StyleInheritedData(const StyleInheritedData&) = default;
 };
 
 }  // namespace blink
 
 #endif  // StyleInheritedData_h