*** FOR PROTOTYPE PURPOSES ONLY! NOT INTENDED FOR COMMIT! ***

Source/core/rendering/RenderReplica.h

Index: Source/core/rendering/RenderReplica.h
diff --git a/Source/core/rendering/RenderReplica.h b/Source/core/rendering/RenderReplica.h
index 84bbc6fab5f0aad2fbb09eb9aa2579da3d4e164d..4e0b7ad742f59b1b3f84c16a3a1f2cafb3b00265 100644
--- a/Source/core/rendering/RenderReplica.h
+++ b/Source/core/rendering/RenderReplica.h
@@ -43,7 +43,15 @@ public:
 
     virtual LayerType layerTypeRequired() const OVERRIDE { return NormalLayer; }
 
+    // This class is an easy demonstration of how to we'd switch over each class
+    // one by one.  The layout here is exceedingly simple and so there isn't much
+    // to do.  There are no children.
+    //
+    // NOTE: I've kept the regular layout method, but it would go away once we're
+    // done switching everything over.
     virtual void layout() OVERRIDE;
+    virtual bool isNonRecursiveLayout() const OVERRIDE { return true; }
+    virtual void preLayout() OVERRIDE;
 
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;