Fix virtual/override/final usage in the rest of Source/core/.

Source/core/testing/InternalSettings.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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.
@@ skipping 71 matching lines @@
     static PassRefPtrWillBeRawPtr<InternalSettings> create(Page& page)
     {
         return adoptRefWillBeNoop(new InternalSettings(page));
     }
     static InternalSettings* from(Page&);
 
 #if !ENABLE(OILPAN)
     void hostDestroyed() { m_page = nullptr; }
 #endif
 
-    virtual ~InternalSettings();
+    ~InternalSettings() override;
     void resetToConsistentState();
 
     void setStandardFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setSerifFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setSansSerifFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setFixedFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setCursiveFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setFantasyFontFamily(const AtomicString& family, const String& script, ExceptionState&);
     void setPictographFontFamily(const AtomicString& family, const String& script, ExceptionState&);
 
@@ skipping 39 matching lines @@
     Page* page() const { return m_page; }
     static const char* supplementName();
 
     RawPtrWillBeWeakMember<Page> m_page;
     Backup m_backup;
 };
 
 } // namespace blink
 
 #endif // InternalSettings_h