Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_monthcalendarimp.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_monthcalendarimp.h"
 
 #include <algorithm>
 
@@ skipping 166 matching lines @@
 }
 CFWL_MonthCalendarImp::~CFWL_MonthCalendarImp() {
   ClearDateItem();
   delete m_pDateTime;
   m_arrSelDays.RemoveAll();
 }
 FWL_ERR CFWL_MonthCalendarImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_MonthCalendar;
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_MonthCalendarImp::GetClassID() const {
-  return FWL_CLASSHASH_MonthCalendar;
-}
+
 FWL_ERR CFWL_MonthCalendarImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
     return FWL_ERR_Indefinite;
   m_pDelegate = new CFWL_MonthCalendarImpDelegate(this);
   return FWL_ERR_Succeeded;
 }
 FWL_ERR CFWL_MonthCalendarImp::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   return CFWL_WidgetImp::Finalize();
@@ skipping 989 matching lines @@
   if (m_pOwner->m_iHovered > 0) {
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, 0, 0);
     m_pOwner->GetDayRect(m_pOwner->m_iHovered, rtInvalidate);
     m_pOwner->m_iHovered = -1;
     if (!rtInvalidate.IsEmpty()) {
       m_pOwner->Repaint(&rtInvalidate);
     }
   }
 }