Remove FX_WORD in favor of uint16_t.

xfa/fwl/basewidget/fwl_scrollbarimp.cpp

 // 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
 
 #include "xfa/fwl/basewidget/fwl_scrollbarimp.h"
 
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/fwl_targetimp.h"
@@ skipping 588 matching lines @@
   }
   if (m_iMinTrackState == FWL_PARTSTATE_SCB_Pressed) {
     DoScroll(FWL_SCBCODE_PageBackward, m_fTrackPos);
     return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY);
   }
   if (m_iMaxTrackState == FWL_PARTSTATE_SCB_Pressed) {
     DoScroll(FWL_SCBCODE_PageForward, m_fTrackPos);
     return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY);
   }
   if (m_iMouseWheel) {
-    FX_WORD dwCode =
+    uint16_t dwCode =
         m_iMouseWheel < 0 ? FWL_SCBCODE_StepForward : FWL_SCBCODE_StepBackward;
     DoScroll(dwCode, m_fTrackPos);
   }
   return TRUE;
 }
 FX_BOOL CFWL_ScrollBarImp::OnScroll(FX_DWORD dwCode, FX_FLOAT fPos) {
   FX_BOOL bRet = TRUE;
   CFWL_EvtScroll ev;
   ev.m_iScrollCode = dwCode;
   ev.m_pSrcTarget = m_pInterface;
@@ skipping 176 matching lines @@
 }
 void CFWL_ScrollBarImpDelegate::DoMouseHover(int32_t iItem,
                                              const CFX_RectF& rtItem,
                                              int32_t& iState) {
   if (iState == FWL_PARTSTATE_SCB_Hovered) {
     return;
   }
   iState = FWL_PARTSTATE_SCB_Hovered;
   m_pOwner->Repaint(&rtItem);
 }