Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_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/core/ifwl_listbox.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/core/cfwl_message.h"
@@ skipping 18 matching lines @@
       m_fScorllBarWidth(0),
       m_bLButtonDown(FALSE),
       m_pScrollBarTP(nullptr) {
   m_rtClient.Reset();
   m_rtConent.Reset();
   m_rtStatic.Reset();
 }
 
 IFWL_ListBox::~IFWL_ListBox() {}
 
-FWL_Error IFWL_ListBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ListBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ListBox::GetClassID() const {
   return FWL_Type::ListBox;
 }
 
 FWL_Error IFWL_ListBox::Initialize() {
   if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
 
   m_pDelegate = new CFWL_ListBoxImpDelegate(this);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ListBox::Finalize() {
-  if (m_pVertScrollBar) {
+void IFWL_ListBox::Finalize() {
+  if (m_pVertScrollBar)
     m_pVertScrollBar->Finalize();
-  }
-  if (m_pHorzScrollBar) {
+  if (m_pHorzScrollBar)
     m_pHorzScrollBar->Finalize();
-  }
+
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ListBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pThemeProvider) {
       m_pProperties->m_pThemeProvider = GetAvailableTheme();
     }
     CFX_SizeF fs = CalcSize(TRUE);
     rect.Set(0, 0, fs.x, fs.y);
@@ skipping 1127 matching lines @@
     m_pOwner->Repaint(&m_pOwner->m_rtClient);
   }
   return TRUE;
 }
 
 void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
   CFWL_EvtLtbSelChanged ev;
   ev.m_pSrcTarget = m_pOwner;
   m_pOwner->DispatchEvent(&ev);
 }