Fix all the code which has duplicate variable declarations

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 725 matching lines @@
       CFWL_ThemePart itemPart;
       itemPart.m_pWidget = m_pInterface;
       itemPart.m_iPart = CFWL_Part::ListItem;
       itemPart.m_pData = m_pProperties->m_pDataProvider;
       itemPart.m_bMaximize = i > 0;
       CFX_RectF r;
       m_pProperties->m_pThemeProvider->GetPartRect(&itemPart, r);
       if (!bAutoSize) {
         CFX_RectF rtItem;
         rtItem.Set(m_rtClient.left, m_rtClient.top + fs.y, r.width, r.height);
-        IFWL_ListBoxDP* pData =
+        IFWL_ListBoxDP* pBox =
             static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
-        pData->SetItemRect(m_pInterface, pItem, rtItem);
+        pBox->SetItemRect(m_pInterface, pItem, rtItem);
       }
       fs.y += r.height;
       if (fs.x < r.width) {
         fs.x = r.width;
         fWidth = r.width;
       }
     }
   } else {
     fWidth = GetMaxTextWidth();
     fWidth += 2 * kItemTextMargin;
@@ skipping 467 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);
 }