Oilpan: avoid invoking some no-op finalizers.

Source/core/css/MediaList.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009, 2010, 2012 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 52 matching lines @@
 
     void trace(Visitor*);
 
 private:
     MediaQuerySet();
     MediaQuerySet(const MediaQuerySet&);
 
     WillBeHeapVector<OwnPtrWillBeMember<MediaQuery> > m_queries;
 };
 
-class MediaList : public RefCountedWillBeGarbageCollectedFinalized<MediaList>, public ScriptWrappable {
+class MediaList final : public RefCountedWillBeGarbageCollected<MediaList>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
+    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaList);
 public:
     static PassRefPtrWillBeRawPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSStyleSheet* parentSheet)
     {
         return adoptRefWillBeNoop(new MediaList(mediaQueries, parentSheet));
     }
+
     static PassRefPtrWillBeRawPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSRule* parentRule)
     {
         return adoptRefWillBeNoop(new MediaList(mediaQueries, parentRule));
     }
 
-    ~MediaList();
-
     unsigned length() const { return m_mediaQueries->queryVector().size(); }
     String item(unsigned index) const;
     void deleteMedium(const String& oldMedium, ExceptionState&);
     void appendMedium(const String& newMedium, ExceptionState&);
 
     String mediaText() const { return m_mediaQueries->mediaText(); }
     void setMediaText(const String&);
 
     // Not part of CSSOM.
     CSSRule* parentRule() const { return m_parentRule; }
@@ skipping 20 matching lines @@
     // Cleared in the ~CSSMediaRule and ~CSSImportRule destructors when oilpan is not enabled.
     RawPtrWillBeMember<CSSRule> m_parentRule;
 };
 
 // Adds message to inspector console whenever dpi or dpcm values are used for "screen" media.
 void reportMediaQueryWarningIfNeeded(Document*, const MediaQuerySet*);
 
 } // namespace blink
 
 #endif