FWL refcounts never incremented (part 2).

xfa/include/fwl/basewidget/fwl_spinbutton.h

Index: xfa/include/fwl/basewidget/fwl_spinbutton.h
diff --git a/xfa/include/fwl/basewidget/fwl_spinbutton.h b/xfa/include/fwl/basewidget/fwl_spinbutton.h
index 79e3f68b5be40e8ad2a4d69dec3c3b901fb221e9..efcfa22a49e634aeebc519143d403ec744768ef6 100644
--- a/xfa/include/fwl/basewidget/fwl_spinbutton.h
+++ b/xfa/include/fwl/basewidget/fwl_spinbutton.h
@@ -30,10 +30,13 @@ END_FWL_EVENT_DEF
 
 class IFWL_SpinButton : public IFWL_Widget {
  public:
-  IFWL_SpinButton();
-  FWL_ERR Initialize(const CFWL_WidgetImpProperties& properties,
-                     IFWL_Widget* pOuter);
+  static IFWL_SpinButton* Create(const CFWL_WidgetImpProperties& properties,
+                                 IFWL_Widget* pOuter);
+
   FWL_ERR EnableButton(FX_BOOL bEnable, FX_BOOL bUp = TRUE);
   FX_BOOL IsButtonEnable(FX_BOOL bUp = TRUE);
+
+ protected:
+  IFWL_SpinButton();
 };
 #endif