Move rendering/RenderObject to layout/LayoutObject.

Source/core/rendering/RenderIFrame.h

Index: Source/core/rendering/RenderIFrame.h
diff --git a/Source/core/rendering/RenderIFrame.h b/Source/core/rendering/RenderIFrame.h
index c43d66bd0845d84deef3296c72c6d1bee6d7b338..c1f7286d29170eafc7513bc54c293f6746a9a8c5 100644
--- a/Source/core/rendering/RenderIFrame.h
+++ b/Source/core/rendering/RenderIFrame.h
@@ -40,14 +40,14 @@ private:
 
     virtual void layout() override;
 
-    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderIFrame || RenderPart::isOfType(type); }
+    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectRenderIFrame || RenderPart::isOfType(type); }
 
     virtual const char* renderName() const override { return "RenderPartObject"; } // Lying for now to avoid breaking tests
 
     virtual LayerType layerTypeRequired() const override;
 };
 
-DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderIFrame, isRenderIFrame());
+DEFINE_LAYOUT_OBJECT_TYPE_CASTS(RenderIFrame, isRenderIFrame());
 
 } // namespace blink