Cleanup unneeded FWL theme code.

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 184 matching lines @@
     DrawBkground(pGraphics, pTheme, pMatrix);
   }
   DrawItems(pGraphics, pTheme, pMatrix);
   pGraphics->RestoreGraphState();
   return FWL_Error::Succeeded;
 }
 FWL_Error CFWL_ListBoxImp::SetThemeProvider(
     IFWL_ThemeProvider* pThemeProvider) {
   if (!pThemeProvider)
     return FWL_Error::Indefinite;
-  if (!pThemeProvider->IsValidWidget(m_pInterface)) {
-    m_pScrollBarTP = pThemeProvider;
-    return FWL_Error::Succeeded;
-  }
   m_pProperties->m_pThemeProvider = pThemeProvider;
   return FWL_Error::Succeeded;
 }
 int32_t CFWL_ListBoxImp::CountSelItems() {
   if (!m_pProperties->m_pDataProvider)
     return 0;
   int32_t iRet = 0;
   IFWL_ListBoxDP* pData =
       static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
   int32_t iCount = pData->CountItems(m_pInterface);
@@ skipping 507 matching lines @@
                          pUIMargin->height);
     }
   }
   FX_FLOAT fWidth = 0;
   if (m_pProperties->m_pThemeProvider->IsCustomizedLayout(m_pInterface)) {
     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);
-      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);
+        rtItem.Set(m_rtClient.left, m_rtClient.top + fs.y, 0, 0);
         IFWL_ListBoxDP* pBox =
             static_cast<IFWL_ListBoxDP*>(m_pProperties->m_pDataProvider);
         pBox->SetItemRect(m_pInterface, pItem, rtItem);
       }
-      fs.y += r.height;
-      if (fs.x < r.width) {
-        fs.x = r.width;
-        fWidth = r.width;
+      if (fs.x < 0) {
+        fs.x = 0;
+        fWidth = 0;
       }
     }
   } else {
     fWidth = GetMaxTextWidth();
     fWidth += 2 * kItemTextMargin;
     if (!bAutoSize) {
       FX_FLOAT fActualWidth =
           m_rtClient.width - rtUIMargin.left - rtUIMargin.width;
       if (fWidth < fActualWidth) {
         fWidth = fActualWidth;
@@ skipping 462 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);
 }