Fix more code which has shadow variables

xfa/fwl/basewidget/fwl_listboximp.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_listboximp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/fwl_comboboximp.h"
@@ skipping 861 matching lines @@
   if (bShowVertScr && bShowHorzScr) {
     m_rtStatic.Set(m_rtClient.right() - m_fScorllBarWidth,
                    m_rtClient.bottom() - m_fScorllBarWidth, m_fScorllBarWidth,
                    m_fScorllBarWidth);
   }
   return fs;
 }
 void CFWL_ListBoxImp::GetItemSize(CFX_SizeF& size,
                                   IFWL_ListItem* pItem,
                                   FX_FLOAT fWidth,
-                                  FX_FLOAT m_fItemHeight,
+                                  FX_FLOAT fItemHeight,
                                   FX_BOOL bAutoSize) {
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_LTB_MultiColumn) {
   } else {
     if (!bAutoSize) {
       CFX_RectF rtItem;
-      rtItem.Set(0, size.y, fWidth, m_fItemHeight);
+      rtItem.Set(0, size.y, fWidth, fItemHeight);
       IFWL_ListBoxDP* pData =
           static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
       pData->SetItemRect(m_pInterface, pItem, rtItem);
     }
     size.x = fWidth;
-    size.y += m_fItemHeight;
+    size.y += fItemHeight;
   }
 }
 FX_FLOAT CFWL_ListBoxImp::GetMaxTextWidth() {
   FX_FLOAT fRet = 0.0f;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
   for (int32_t i = 0; i < iCount; i++) {
     IFWL_ListItem* pItem = pData->GetItem(m_pInterface, i);
     if (!pItem) {
@@ skipping 321 matching lines @@
     pScrollBar->SetTrackPos(fPos);
     m_pOwner->Repaint(&m_pOwner->m_rtClient);
   }
   return TRUE;
 }
 void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
   CFWL_EvtLtbSelChanged ev;
   ev.m_pSrcTarget = m_pOwner->m_pInterface;
   m_pOwner->DispatchEvent(&ev);
 }