Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/core/fwl_widgetimp.h

 // 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
 
 #ifndef XFA_FWL_CORE_FWL_WIDGETIMP_H_
 #define XFA_FWL_CORE_FWL_WIDGETIMP_H_
 
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/ifwl_widgetdelegate.h"
 #include "xfa/fwl/core/include/fwl_widgethit.h"
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 
 class CFWL_AppImp;
 class CFWL_MsgKey;
 class CFWL_WidgetImpProperties;
 class CFWL_WidgetMgr;
 class IFWL_App;
 class IFWL_DataProvider;
 class IFWL_ThemeProvider;
 class IFWL_Widget;
+enum class FWL_Type;
 
 class CFWL_WidgetImp {
  public:
   virtual ~CFWL_WidgetImp();
 
   virtual FWL_Error Initialize();
   virtual FWL_Error Finalize();
   virtual FWL_Error GetClassName(CFX_WideString& wsClass) const;
-  virtual uint32_t GetClassID() const;
+  virtual FWL_Type GetClassID() const = 0;
   virtual FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const;
 
   virtual FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
   virtual FWL_Error GetGlobalRect(CFX_RectF& rect);
   virtual FWL_Error SetWidgetRect(const CFX_RectF& rect);
   virtual FWL_Error GetClientRect(CFX_RectF& rect);
   virtual IFWL_Widget* GetParent();
   virtual FWL_Error SetParent(IFWL_Widget* pParent);
   virtual IFWL_Widget* GetOwner();
   virtual FWL_Error SetOwner(IFWL_Widget* pOwner);
@@ skipping 120 matching lines @@
  public:
   CFWL_WidgetImpDelegate();
   ~CFWL_WidgetImpDelegate() override {}
   void OnProcessMessage(CFWL_Message* pMessage) override;
   void OnProcessEvent(CFWL_Event* pEvent) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix = NULL) override;
 };
 
 #endif  // XFA_FWL_CORE_FWL_WIDGETIMP_H_