Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_spinbuttonimp.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_spinbuttonimp.h"
 
 #include "xfa/fwl/basewidget/ifwl_spinbutton.h"
 #include "xfa/fwl/core/cfwl_message.h"
@@ skipping 41 matching lines @@
   m_rtClient.Reset();
   m_rtUpButton.Reset();
   m_rtDnButton.Reset();
   m_pProperties->m_dwStyleExes |= FWL_STYLEEXE_SPB_Vert;
 }
 CFWL_SpinButtonImp::~CFWL_SpinButtonImp() {}
 FWL_ERR CFWL_SpinButtonImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_SpinButton;
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_SpinButtonImp::GetClassID() const {
-  return FWL_CLASSHASH_SpinButton;
-}
+
 FWL_ERR CFWL_SpinButtonImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
     return FWL_ERR_Indefinite;
   m_pDelegate = new CFWL_SpinButtonImpDelegate(this);
   return FWL_ERR_Succeeded;
 }
 FWL_ERR CFWL_SpinButtonImp::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   return CFWL_WidgetImp::Finalize();
@@ skipping 349 matching lines @@
   if (!bUpEnable && !bDownEnable) {
     return;
   }
   CFWL_EvtSpbClick wmPosChanged;
   wmPosChanged.m_pSrcTarget = m_pOwner->m_pInterface;
   wmPosChanged.m_bUp = bUpEnable;
   m_pOwner->DispatchEvent(&wmPosChanged);
   m_pOwner->Repaint(bUpEnable ? &m_pOwner->m_rtUpButton
                               : &m_pOwner->m_rtDnButton);
 }