call into hwcomposer HAL when present

Change-Id: I70f31c69a9436a43860e78977442863ecba6d27b
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index e1d283b..188da6a 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -68,6 +68,8 @@
     bool isFixedSize() const;
 
     // LayerBase interface
+    virtual void setGeometry(hwc_layer_t* hwcl);
+    virtual void setPerFrameData(hwc_layer_t* hwcl);
     virtual void onDraw(const Region& clip) const;
     virtual uint32_t doTransaction(uint32_t transactionFlags);
     virtual void lockPageFlip(bool& recomputeVisibleRegions);