Smaller vtbls in RenderObject

Source/core/rendering/RenderListMarker.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009 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 45 matching lines @@
     static UChar listMarkerSuffix(EListStyleType, int value);
 
     void listItemStyleDidChange();
 
 private:
     RenderListMarker(RenderListItem*);
 
     virtual const char* renderName() const override { return "RenderListMarker"; }
     virtual void computePreferredLogicalWidths() override;
 
-    virtual bool isListMarker() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectListMarker || RenderBox::isOfType(type); }
 
     virtual void paint(PaintInfo&, const LayoutPoint&) override;
 
     virtual void layout() override;
 
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) override;
 
     virtual InlineBox* createInlineBox() override;
 
     virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
@@ skipping 14 matching lines @@
     String m_text;
     RefPtr<StyleImage> m_image;
     RawPtrWillBeMember<RenderListItem> m_listItem;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderListMarker, isListMarker());
 
 } // namespace blink
 
 #endif // RenderListMarker_h