Refactor ObjectPainter::paintOutline to take a paintOffset

Source/core/layout/svg/LayoutSVGModelObject.h

Index: Source/core/layout/svg/LayoutSVGModelObject.h
diff --git a/Source/core/layout/svg/LayoutSVGModelObject.h b/Source/core/layout/svg/LayoutSVGModelObject.h
index 674251e6660b2246ee3d7817f913cc3f7e1411eb..ed9de75a0ab3f464a166c840a60b7d4dc3968525 100644
--- a/Source/core/layout/svg/LayoutSVGModelObject.h
+++ b/Source/core/layout/svg/LayoutSVGModelObject.h
@@ -64,6 +64,10 @@ public:
 
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectSVG || LayoutObject::isOfType(type); }
 
+    // TODO(pdr): The outline extent should be included in paintInvalidationRectInLocalCoordinates.
+    // Returns the paint invalidation size inflated for the outline extent.
+    LayoutRect outlineVisualOverflowRect() const;
+
 protected:
     void addLayerHitTestRects(LayerHitTestRects&, const DeprecatedPaintLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const final;
     void willBeDestroyed() override;