Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/fwl_pictureboximp.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_pictureboximp.h"
 
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/fwl_widgetimp.h"
@@ skipping 16 matching lines @@
     const CFWL_WidgetImpProperties& properties,
     IFWL_Widget* pOuter)
     : CFWL_WidgetImp(properties, pOuter),
       m_bTop(FALSE),
       m_bVCenter(FALSE),
       m_bButton(FALSE) {
   m_rtClient.Reset();
   m_rtImage.Reset();
   m_matrix.SetIdentity();
 }
+
 CFWL_PictureBoxImp::~CFWL_PictureBoxImp() {}
+
 FWL_Error CFWL_PictureBoxImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_PictureBox;
   return FWL_Error::Succeeded;
 }
-uint32_t CFWL_PictureBoxImp::GetClassID() const {
-  return FWL_CLASSHASH_PictureBox;
+
+FWL_Type CFWL_PictureBoxImp::GetClassID() const {
+  return FWL_Type::PictureBox;
 }
+
 FWL_Error CFWL_PictureBoxImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
+
   m_pDelegate = new CFWL_PictureBoxImpDelegate(this);
   return FWL_Error::Succeeded;
 }
+
 FWL_Error CFWL_PictureBoxImp::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   return CFWL_WidgetImp::Finalize();
 }
 FWL_Error CFWL_PictureBoxImp::GetWidgetRect(CFX_RectF& rect,
                                             FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     if (!m_pProperties->m_pDataProvider)
@@ skipping 83 matching lines @@
 }
 
 CFWL_PictureBoxImpDelegate::CFWL_PictureBoxImpDelegate(
     CFWL_PictureBoxImp* pOwner)
     : m_pOwner(pOwner) {}
 
 void CFWL_PictureBoxImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                               const CFX_Matrix* pMatrix) {
   m_pOwner->DrawWidget(pGraphics, pMatrix);
 }