Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/theme/cfwl_checkboxtp.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/theme/cfwl_checkboxtp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/ifwl_checkbox.h"
@@ skipping 23 matching lines @@
 
 CFWL_CheckBoxTP::~CFWL_CheckBoxTP() {
   delete m_pThemeData;
   if (m_pCheckPath) {
     m_pCheckPath->Clear();
     delete m_pCheckPath;
   }
 }
 
 FX_BOOL CFWL_CheckBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
-  return pWidget && pWidget->GetClassID() == FWL_CLASSHASH_CheckBox;
+  return pWidget && pWidget->GetClassID() == FWL_Type::CheckBox;
 }
 uint32_t CFWL_CheckBoxTP::SetThemeID(IFWL_Widget* pWidget,
                                      uint32_t dwThemeID,
                                      FX_BOOL bChildren) {
   if (m_pThemeData) {
     SetThemeData(FWL_GetThemeColor(dwThemeID));
   }
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID, bChildren);
 }
 FX_BOOL CFWL_CheckBoxTP::DrawText(CFWL_ThemeText* pParams) {
@@ skipping 441 matching lines @@
                            pt1.x + px2 * FX_BEZIER, pt1.y + py2 * FX_BEZIER,
                            pt1.x, pt1.y);
     FX_FLOAT fScale = fCheckLen / kSignPath;
     CFX_Matrix mt;
     mt.Set(1, 0, 0, 1, 0, 0);
     mt.Scale(fScale, fScale);
     CFX_PathData* pData = m_pCheckPath->GetPathData();
     pData->Transform(&mt);
   }
 }