Continue IFWL widget cleanup.

xfa/fwl/core/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/core/cfwl_listbox.h"
 
 #include <memory>
 
@@ skipping 101 matching lines @@
   return m_ItemArray[nIndex].get();
 }
 
 uint32_t CFWL_ListBox::GetItemStates(CFWL_ListItem* pItem) {
   if (!pItem)
     return 0;
   CFWL_ListItem* pListItem = static_cast<CFWL_ListItem*>(pItem);
   return pListItem->m_dwStates | pListItem->m_dwCheckState;
 }
 
-FWL_Error CFWL_ListBox::GetCaption(IFWL_Widget* pWidget,
-                                   CFX_WideString& wsCaption) {
+void CFWL_ListBox::GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption) {
   wsCaption = L"";
-  return FWL_Error::Succeeded;
 }
 
 int32_t CFWL_ListBox::CountItems(const IFWL_Widget* pWidget) {
   return pdfium::CollectionSize<int32_t>(m_ItemArray);
 }
 
 CFWL_ListItem* CFWL_ListBox::GetItem(const IFWL_Widget* pWidget,
                                      int32_t nIndex) {
   if (nIndex < 0 || nIndex >= CountItems(pWidget))
     return nullptr;
@@ skipping 89 matching lines @@
 uint32_t CFWL_ListBox::GetItemCheckState(IFWL_Widget* pWidget,
                                          CFWL_ListItem* pItem) {
   return static_cast<CFWL_ListItem*>(pItem)->m_dwCheckState;
 }
 
 void CFWL_ListBox::SetItemCheckState(IFWL_Widget* pWidget,
                                      CFWL_ListItem* pItem,
                                      uint32_t dwCheckState) {
   static_cast<CFWL_ListItem*>(pItem)->m_dwCheckState = dwCheckState;
 }