Remove more unused widget styles

xfa/fwl/cfwl_listbox.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/cfwl_listbox.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 52 matching lines @@
     case FWL_STYLEEXT_LTB_RightAlign: {
       m_iTTOAligns = FDE_TTOALIGNMENT_CenterRight;
       break;
     }
     case FWL_STYLEEXT_LTB_CenterAlign:
     default: {
       m_iTTOAligns = FDE_TTOALIGNMENT_Center;
       break;
     }
   }
-  if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading)
-    m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
-
   m_dwTTOStyles |= FDE_TTOSTYLE_SingleLine;
   m_fScorllBarWidth = GetScrollWidth();
   CalcSize(false);
 }
 
 FWL_WidgetHit CFWL_ListBox::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (IsShowScrollBar(false)) {
     CFX_RectF rect = m_pHorzScrollBar->GetWidgetRect();
     if (rect.Contains(fx, fy))
       return FWL_WidgetHit::HScrollBar;
@@ skipping 419 matching lines @@
 
   int32_t iCount = CountItems(this);
   CFX_SizeF fs;
   for (int32_t i = 0; i < iCount; i++) {
     CFWL_ListItem* htem = GetItem(this, i);
     UpdateItemSize(htem, fs, fWidth, m_fItemHeight, bAutoSize);
   }
   if (bAutoSize)
     return fs;
 
-  FX_FLOAT iWidth = m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
   FX_FLOAT iHeight = m_rtClient.height;
   bool bShowVertScr = false;
   bool bShowHorzScr = false;
   if (!bShowVertScr && (m_pProperties->m_dwStyles & FWL_WGTSTYLE_VScroll))
     bShowVertScr = (fs.y > iHeight);
-  if (!bShowHorzScr && (m_pProperties->m_dwStyles & FWL_WGTSTYLE_HScroll))
-    bShowHorzScr = (fs.x > iWidth);
 
   CFX_SizeF szRange;
   if (bShowVertScr) {
     if (!m_pVertScrollBar)
       InitVerticalScrollBar();
 
     CFX_RectF rtScrollBar;
     rtScrollBar.Set(m_rtClient.right() - m_fScorllBarWidth, m_rtClient.top,
                     m_fScorllBarWidth, m_rtClient.height - 1);
     if (bShowHorzScr)
@@ skipping 421 matching lines @@
     if (CFWL_ListItem* item = GetItem(this, iSel))
       item->SetStates(item->GetStates() | FWL_ITEMSTATE_LTB_Selected);
   }
 
   m_ItemArray.erase(m_ItemArray.begin() + nIndex);
 }
 
 void CFWL_ListBox::DeleteAll() {
   m_ItemArray.clear();
 }