FWL refcounts never incremented (part 2).

xfa/include/fwl/basewidget/fwl_spinbutton.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef _FWL_SPINBUTTON_H
 #define _FWL_SPINBUTTON_H
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
@@ skipping 12 matching lines @@
 #define FWL_WGTHITTEST_SPB_UpButton (FWL_WGTHITTEST_MAX + 1)
 #define FWL_WGTHITTEST_SPB_DownButton (FWL_WGTHITTEST_MAX + 2)
 #define FWL_EVT_SPB_Click L"FWL_EVENT_SPB_Click"
 #define FWL_EVTHASH_SPB_Click 2927651187
 BEGIN_FWL_EVENT_DEF(CFWL_EvtSpbClick, FWL_EVTHASH_SPB_Click)
 FX_BOOL m_bUp;
 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