Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_checkboximp.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_checkboximp.h"
 
 #include <algorithm>
 
@@ skipping 34 matching lines @@
                                    IFWL_Widget* pOuter)
     : CFWL_WidgetImp(properties, pOuter),
       m_dwTTOStyles(FDE_TTOSTYLE_SingleLine),
       m_iTTOAlign(FDE_TTOALIGNMENT_Center),
       m_bBtnDown(FALSE) {
   m_rtClient.Reset();
   m_rtBox.Reset();
   m_rtCaption.Reset();
   m_rtFocus.Reset();
 }
+
 CFWL_CheckBoxImp::~CFWL_CheckBoxImp() {}
+
 FWL_Error CFWL_CheckBoxImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_CheckBox;
   return FWL_Error::Succeeded;
 }
-uint32_t CFWL_CheckBoxImp::GetClassID() const {
-  return FWL_CLASSHASH_CheckBox;
+
+FWL_Type CFWL_CheckBoxImp::GetClassID() const {
+  return FWL_Type::CheckBox;
 }
+
 FWL_Error CFWL_CheckBoxImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
+
   m_pDelegate = new CFWL_CheckBoxImpDelegate(this);
   return FWL_Error::Succeeded;
 }
+
 FWL_Error CFWL_CheckBoxImp::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   return CFWL_WidgetImp::Finalize();
 }
 FWL_Error CFWL_CheckBoxImp::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pThemeProvider)
       m_pProperties->m_pThemeProvider = GetAvailableTheme();
@@ skipping 479 matching lines @@
 void CFWL_CheckBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
   if (pMsg->m_dwKeyCode == FWL_VKEY_Tab) {
     m_pOwner->DispatchKeyEvent(pMsg);
     return;
   }
   if (pMsg->m_dwKeyCode == FWL_VKEY_Return ||
       pMsg->m_dwKeyCode == FWL_VKEY_Space) {
     m_pOwner->NextStates();
   }
 }