Compare font-feature-settings as part of Font::operator==().

third_party/WebKit/Source/platform/fonts/FontFeatureSettings.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT FontFeature {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 public:
     FontFeature(const AtomicString& tag, int value);
-    bool operator==(const FontFeature&);
+    bool operator==(const FontFeature&) const;
 
     const AtomicString& tag() const { return m_tag; }
     int value() const { return m_value; }
 
 private:
     AtomicString m_tag;
     const int m_value;
 };
 
 class PLATFORM_EXPORT FontFeatureSettings : public RefCounted<FontFeatureSettings> {
     WTF_MAKE_NONCOPYABLE(FontFeatureSettings);
 public:
     static PassRefPtr<FontFeatureSettings> create()
     {
         return adoptRef(new FontFeatureSettings());
     }
     void append(const FontFeature& feature) { m_list.append(feature); }
     size_t size() const { return m_list.size(); }
     const FontFeature& operator[](int index) const { return m_list[index]; }
     const FontFeature& at(size_t index) const { return m_list.at(index); }
+    bool operator==(const FontFeatureSettings&) const;
 
 private:
     FontFeatureSettings();
     Vector<FontFeature> m_list;
 };
 
 } // namespace blink
 
 #endif // FontFeatureSettings_h