Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/ifwl_checkbox.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_BASEWIDGET_IFWL_CHECKBOX_H_
 #define XFA_FWL_BASEWIDGET_IFWL_CHECKBOX_H_
 
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
 
 #define FWL_CLASS_CheckBox L"FWL_CHECKBOX"
-#define FWL_CLASSHASH_CheckBox 4107183823
 #define FWL_STYLEEXT_CKB_Left (0L << 0)
 #define FWL_STYLEEXT_CKB_Center (1L << 0)
 #define FWL_STYLEEXT_CKB_Right (2L << 0)
 #define FWL_STYLEEXT_CKB_Top (0L << 2)
 #define FWL_STYLEEXT_CKB_VCenter (1L << 2)
 #define FWL_STYLEEXT_CKB_Bottom (2L << 2)
 #define FWL_STYLEEXT_CKB_LeftText (1L << 4)
 #define FWL_STYLEEXT_CKB_MultiLine (1L << 5)
 #define FWL_STYLEEXT_CKB_3State (1L << 6)
 #define FWL_STYLEEXT_CKB_RadioButton (1L << 7)
@@ skipping 32 matching lines @@
   static IFWL_CheckBox* Create(const CFWL_WidgetImpProperties& properties,
                                IFWL_Widget* pOuter);
   int32_t GetCheckState();
   FWL_Error SetCheckState(int32_t iCheck);
 
  protected:
   IFWL_CheckBox();
 };
 
 #endif  // XFA_FWL_BASEWIDGET_IFWL_CHECKBOX_H_