Delete a bunch of paint invalidation rect computing code.

sky/engine/core/rendering/RenderReplaced.h

Index: sky/engine/core/rendering/RenderReplaced.h
diff --git a/sky/engine/core/rendering/RenderReplaced.h b/sky/engine/core/rendering/RenderReplaced.h
index 49ff1b748353fb9d1cf82338f69fb9e3c736ca77..8074fa53ee8f27cd8e7645b7d69e19b36dbd1709 100644
--- a/sky/engine/core/rendering/RenderReplaced.h
+++ b/sky/engine/core/rendering/RenderReplaced.h
@@ -78,8 +78,6 @@ private:
     virtual void computePreferredLogicalWidths() override final;
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) { }
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override;
-
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override final;
 
     virtual bool canBeSelectionLeaf() const override { return true; }