Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_comboboximp.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_comboboximp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fee/fde_txtedtengine.h"
@@ skipping 472 matching lines @@
   m_rtHandler.Reset();
 }
 
 CFWL_ComboBoxImp::~CFWL_ComboBoxImp() {}
 
 FWL_Error CFWL_ComboBoxImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_ComboBox;
   return FWL_Error::Succeeded;
 }
 
-uint32_t CFWL_ComboBoxImp::GetClassID() const {
-  return FWL_CLASSHASH_ComboBox;
+FWL_Type CFWL_ComboBoxImp::GetClassID() const {
+  return FWL_Type::ComboBox;
 }
 
 FWL_Error CFWL_ComboBoxImp::Initialize() {
   if (m_pWidgetMgr->IsFormDisabled())
     return DisForm_Initialize();
+
   if (CFWL_WidgetImp::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
 
   m_pDelegate = new CFWL_ComboBoxImpDelegate(this);
   CFWL_WidgetImpProperties prop;
   prop.m_pThemeProvider = m_pProperties->m_pThemeProvider;
   prop.m_dwStyles |= FWL_WGTSTYLE_Border | FWL_WGTSTYLE_VScroll;
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CMB_ListItemIconText)
     prop.m_dwStyleExes |= FWL_STYLEEXT_LTB_Icon;
 
@@ skipping 1340 matching lines @@
   m_pComboBox->ShowDropList(FALSE);
 }
 void CFWL_ComboProxyImpDelegate::OnFocusChanged(CFWL_MsgKillFocus* pMsg,
                                                 FX_BOOL bSet) {
   if (!bSet) {
     if (pMsg->m_pSetFocus == NULL) {
       m_pComboBox->ShowDropList(FALSE);
     }
   }
 }