Smaller vtbls in RenderObject

Source/core/rendering/RenderRuby.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 45 matching lines @@
     RenderRubyAsInline(Element*);
     virtual ~RenderRubyAsInline();
 
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) override;
     virtual void removeChild(RenderObject* child) override;
 
 protected:
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
 
 private:
-    virtual bool isRuby() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRuby || RenderInline::isOfType(type); }
     virtual const char* renderName() const override { return "RenderRuby (inline)"; }
     virtual bool createsAnonymousWrapper() const override { return true; }
 };
 
 // <ruby> when used as 'display:block' or 'display:inline-block'
 class RenderRubyAsBlock final : public RenderBlockFlow {
 public:
     RenderRubyAsBlock(Element*);
     virtual ~RenderRubyAsBlock();
 
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) override;
     virtual void removeChild(RenderObject* child) override;
 
 protected:
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
 
 private:
-    virtual bool isRuby() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRuby || RenderBlockFlow::isOfType(type); }
     virtual const char* renderName() const override { return "RenderRuby (block)"; }
     virtual bool createsAnonymousWrapper() const override { return true; }
     virtual void removeLeftoverAnonymousBlock(RenderBlock*) override { ASSERT_NOT_REACHED(); }
 };
 
 } // namespace blink
 
 #endif // RenderRuby_h