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 1b90bd3b084cd3f29d562e73f8a788fdf349bb9b..20331d41827bc1500b968191515e6c2cf8037906 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -1075,6 +1075,7 @@ 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;
@@ -1103,8 +1104,6 @@ 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();