more surfaceflinger cleanups

get rid of the "fake rtti" code, and use polymorphism instead.
also simplify how we log SF's state (using polymorphism)

Change-Id: I2bae7c98de4dd207a3e2b00083fa3fde7c467922
diff --git a/libs/surfaceflinger/SurfaceFlinger.h b/libs/surfaceflinger/SurfaceFlinger.h
index d75dc15..9c8de51 100644
--- a/libs/surfaceflinger/SurfaceFlinger.h
+++ b/libs/surfaceflinger/SurfaceFlinger.h
@@ -73,7 +73,6 @@
 
     inline  bool                    isValid(int32_t i) const;
     sp<LayerBaseClient>             getLayerUser(int32_t i) const;
-    void                            dump(const char* what);
     
     const Vector< wp<LayerBaseClient> >& getLayers() const { 
         return mLayers; 
@@ -281,6 +280,7 @@
             void        destroyConnection(ClientID cid);
             sp<LayerBaseClient> getLayerUser_l(SurfaceID index) const;
             status_t    addLayer_l(const sp<LayerBase>& layer);
+            status_t    addClientLayer_l(const sp<LayerBaseClient>& lbc);
             status_t    removeLayer_l(const sp<LayerBase>& layer);
             status_t    purgatorizeLayer_l(const sp<LayerBase>& layer);
             void        free_resources_l();