Remove FX_DWORD from XFA, part 2

xfa/include/fwl/lightwidget/scrollbar.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 XFA_INCLUDE_FWL_LIGHTWIDGET_SCROLLBAR_H_
 #define XFA_INCLUDE_FWL_LIGHTWIDGET_SCROLLBAR_H_
 
 #include "xfa/include/fwl/lightwidget/widget.h"
 
 class CFWL_ScrollBar : public CFWL_Widget {
  public:
   static CFWL_ScrollBar* Create();
   FWL_ERR Initialize(const CFWL_WidgetProperties* pProperties = NULL);
   FX_BOOL IsVertical();
   FWL_ERR GetRange(FX_FLOAT& fMin, FX_FLOAT& fMax);
   FWL_ERR SetRange(FX_FLOAT fMin, FX_FLOAT fMax);
   FX_FLOAT GetPageSize();
   FWL_ERR SetPageSize(FX_FLOAT fPageSize);
   FX_FLOAT GetStepSize();
   FWL_ERR SetStepSize(FX_FLOAT fStepSize);
   FX_FLOAT GetPos();
   FWL_ERR SetPos(FX_FLOAT fPos);
   FX_FLOAT GetTrackPos();
   FWL_ERR SetTrackPos(FX_FLOAT fTrackPos);
-  FX_BOOL DoScroll(FX_DWORD dwCode, FX_FLOAT fPos = 0.0f);
+  FX_BOOL DoScroll(uint32_t dwCode, FX_FLOAT fPos = 0.0f);
   CFWL_ScrollBar();
   virtual ~CFWL_ScrollBar();
 };
 
 #endif  // XFA_INCLUDE_FWL_LIGHTWIDGET_SCROLLBAR_H_