Move painting code from RenderBoxModelObject into BoxPainter.

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 5c753e77d87d6c4dcd5802223f84e06f290bd801..6e9576a6edea049bbe65ac78f20fe6e2f4ce8346 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -1079,6 +1079,7 @@ public:
 
     // FIXME: This is temporary for cases that setShouldDoFullPaintInvalidation(true) doesn't work yet.
     void doNotUseInvalidatePaintForWholeRendererSynchronously() const { invalidatePaintForWholeRenderer(); }
+    virtual LayoutRect viewRect() const;
 
 protected:
     inline bool layerCreationAllowedForSubtree() const;
@@ -1107,8 +1108,6 @@ protected:
     void paintOutline(PaintInfo&, const LayoutRect&);
     void addChildFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const;
 
-    virtual LayoutRect viewRect() const;
-
     void clearLayoutRootIfNeeded() const;
     virtual void willBeDestroyed();
     void postDestroy();