Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_datetimepickerimp.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_datetimepickerimp.h"
 
 #include "xfa/fwl/basewidget/fwl_editimp.h"
 #include "xfa/fwl/basewidget/fwl_formproxyimp.h"
@@ skipping 419 matching lines @@
       m_pEdit(nullptr),
       m_pMonthCal(nullptr),
       m_pForm(nullptr) {
   m_rtBtn.Set(0, 0, 0, 0);
 }
 CFWL_DateTimePickerImp::~CFWL_DateTimePickerImp() {}
 FWL_ERR CFWL_DateTimePickerImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_DateTimePicker;
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_DateTimePickerImp::GetClassID() const {
-  return FWL_CLASSHASH_DateTimePicker;
-}
+
 FWL_ERR CFWL_DateTimePickerImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
     return FWL_ERR_Indefinite;
   m_pDelegate = new CFWL_DateTimePickerImpDelegate(this);
   m_pProperties->m_dwStyleExes = FWL_STYLEEXT_DTP_ShortDateFormat;
   CFWL_WidgetImpProperties propMonth;
   propMonth.m_dwStyles = FWL_WGTSTYLE_Popup | FWL_WGTSTYLE_Border;
   propMonth.m_dwStates = FWL_WGTSTATE_Invisible;
   propMonth.m_pDataProvider = &m_MonthCalendarDP;
   propMonth.m_pParent = m_pInterface;
@@ skipping 711 matching lines @@
     }
     if (m_pOwner->m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
       pMsg->m_pSrcTarget = m_pOwner->m_pEdit.get();
       IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(NULL);
       pDelegate->OnProcessMessage(pMsg);
     }
   }
   rtInvalidate.Inflate(2, 2);
   m_pOwner->Repaint(&rtInvalidate);
 }