Move rendering/RenderObject to layout/LayoutObject.

Source/core/html/HTMLFieldSetElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2010 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 33 matching lines @@
     void setNeedsValidityCheck();
 
 protected:
     virtual void disabledAttributeChanged() override;
 
 private:
     HTMLFieldSetElement(Document&, HTMLFormElement*);
 
     virtual bool isEnumeratable() const override { return true; }
     virtual bool supportsFocus() const override;
-    virtual RenderObject* createRenderer(const RenderStyle&) override;
+    virtual LayoutObject* createRenderer(const RenderStyle&) override;
     virtual const AtomicString& formControlType() const override;
     virtual bool recalcWillValidate() const override { return false; }
     virtual bool matchesValidityPseudoClasses() const override final;
     virtual bool isValidElement() override final;
     virtual void childrenChanged(const ChildrenChange&) override;
     virtual bool areAuthorShadowsAllowed() const override { return false; }
 
     static void invalidateDisabledStateUnder(Element&);
     void refreshElementsIfNeeded() const;
 
     mutable FormAssociatedElement::List m_associatedElements;
     // When dom tree is modified, we have to refresh the m_associatedElements array.
     mutable uint64_t m_documentVersion;
 };
 
 } // namespace blink
 
 #endif // HTMLFieldSetElement_h