Move rendering/RenderObject to layout/LayoutObject.

Source/core/rendering/RenderScrollbarPart.h

Index: Source/core/rendering/RenderScrollbarPart.h
diff --git a/Source/core/rendering/RenderScrollbarPart.h b/Source/core/rendering/RenderScrollbarPart.h
index 1ea0102f526570c99c578c9170fc934094d67881..2f0a9feaf6134c123f1124b89a014dfc08ead087 100644
--- a/Source/core/rendering/RenderScrollbarPart.h
+++ b/Source/core/rendering/RenderScrollbarPart.h
@@ -72,8 +72,8 @@ public:
         return RenderBlock::marginRight();
     }
 
-    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderScrollbarPart || RenderBlock::isOfType(type); }
-    RenderObject* rendererOwningScrollbar() const;
+    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectRenderScrollbarPart || RenderBlock::isOfType(type); }
+    LayoutObject* rendererOwningScrollbar() const;
 
 protected:
     virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
@@ -108,7 +108,7 @@ private:
     ScrollbarPart m_part;
 };
 
-DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderScrollbarPart, isRenderScrollbarPart());
+DEFINE_LAYOUT_OBJECT_TYPE_CASTS(RenderScrollbarPart, isRenderScrollbarPart());
 
 } // namespace blink