Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_spinbutton.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_spinbutton.h"
 
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
@@ skipping 20 matching lines @@
       m_bLButtonDwn(FALSE),
       m_pTimerInfo(nullptr) {
   m_rtClient.Reset();
   m_rtUpButton.Reset();
   m_rtDnButton.Reset();
   m_pProperties->m_dwStyleExes |= FWL_STYLEEXE_SPB_Vert;
 }
 
 IFWL_SpinButton::~IFWL_SpinButton() {}
 
-FWL_Error IFWL_SpinButton::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_SpinButton;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_SpinButton::GetClassID() const {
   return FWL_Type::SpinButton;
 }
 
 FWL_Error IFWL_SpinButton::Initialize() {
   if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
 
   m_pDelegate = new CFWL_SpinButtonImpDelegate(this);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_SpinButton::Finalize() {
+void IFWL_SpinButton::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_SpinButton::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, kMinWidth, kMinHeight);
     IFWL_Widget::GetWidgetRect(rect, TRUE);
   } else {
     rect = m_pProperties->m_rtWidget;
   }
   return FWL_Error::Succeeded;
@@ skipping 347 matching lines @@
   if (!bUpEnable && !bDownEnable) {
     return;
   }
   CFWL_EvtSpbClick wmPosChanged;
   wmPosChanged.m_pSrcTarget = m_pOwner;
   wmPosChanged.m_bUp = bUpEnable;
   m_pOwner->DispatchEvent(&wmPosChanged);
   m_pOwner->Repaint(bUpEnable ? &m_pOwner->m_rtUpButton
                               : &m_pOwner->m_rtDnButton);
 }