Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/ifwl_datetimepicker.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_DATETIMEPICKER_H_
 #define XFA_FWL_BASEWIDGET_IFWL_DATETIMEPICKER_H_
 
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
 
 #define FWL_CLASS_DateTimePicker L"FWL_DATETIMEPICKER"
-#define FWL_CLASSHASH_DateTimePicker 3851176257
 #define FWL_STYLEEXT_DTP_AllowEdit (1L << 0)
 #define FWL_STYLEEXT_DTP_LongDateFormat (0L << 1)
 #define FWL_STYLEEXT_DTP_ShortDateFormat (1L << 1)
 #define FWL_STYLEEXT_DTP_TimeFormat (2L << 1)
 #define FWL_STYLEEXT_DTP_Spin (1L << 3)
 #define FWL_STYLEEXT_DTP_EditHNear (0L << 4)
 #define FWL_STYLEEXT_DTP_EditHCenter (1L << 4)
 #define FWL_STYLEEXT_DTP_EditHFar (2L << 4)
 #define FWL_STYLEEXT_DTP_EditVNear (0L << 6)
 #define FWL_STYLEEXT_DTP_EditVCenter (1L << 6)
@@ skipping 61 matching lines @@
   FWL_Error GetBBox(CFX_RectF& rect);
   FWL_Error SetEditLimit(int32_t nLimit);
   FWL_Error ModifyEditStylesEx(uint32_t dwStylesExAdded,
                                uint32_t dwStylesExRemoved);
 
  protected:
   IFWL_DateTimePicker();
 };
 
 #endif  // XFA_FWL_BASEWIDGET_IFWL_DATETIMEPICKER_H_