Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_combobox.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_combobox.h"
 
 #include "xfa/fde/cfde_txtedtengine.h"
 #include "xfa/fde/tto/fde_textout.h"
@@ skipping 17 matching lines @@
       m_iBtnState(CFWL_PartState_Normal),
       m_fComboFormHandler(0),
       m_bNeedShowList(FALSE) {
   m_rtClient.Reset();
   m_rtBtn.Reset();
   m_rtHandler.Reset();
 }
 
 IFWL_ComboBox::~IFWL_ComboBox() {}
 
-FWL_Error IFWL_ComboBox::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ComboBox;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ComboBox::GetClassID() const {
   return FWL_Type::ComboBox;
 }
 
 FWL_Error IFWL_ComboBox::Initialize() {
   if (m_pWidgetMgr->IsFormDisabled())
     return DisForm_Initialize();
 
   if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
@@ skipping 14 matching lines @@
     m_pEdit->Initialize();
     m_pEdit->SetOuter(this);
   }
   if (m_pEdit)
     m_pEdit->SetParent(this);
 
   SetStates(m_pProperties->m_dwStates);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ComboBox::Finalize() {
-  if (m_pEdit) {
+void IFWL_ComboBox::Finalize() {
+  if (m_pEdit)
     m_pEdit->Finalize();
-  }
+
   m_pListBox->Finalize();
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ComboBox::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Reset();
     FX_BOOL bIsDropDown = IsDropDownStyle();
     if (bIsDropDown && m_pEdit) {
       m_pEdit->GetWidgetRect(rect, TRUE);
     } else {
       rect.width = 100;
@@ skipping 1334 matching lines @@
 }
 
 void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
                                                 FX_BOOL bSet) {
   if (!bSet) {
     if (!pMsg->m_pSetFocus) {
       m_pComboBox->ShowDropList(FALSE);
     }
   }
 }