Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/ifwl_pushbutton.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_PUSHBUTTON_H_
 #define XFA_FWL_BASEWIDGET_IFWL_PUSHBUTTON_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 #define FWL_CLASS_PushButton L"FWL_PUSHBUTTON"
-#define FWL_CLASSHASH_PushButton 3521614244
 #define FWL_STYLEEXT_PSB_Left (0L << 0)
 #define FWL_STYLEEXT_PSB_Center (1L << 0)
 #define FWL_STYLEEXT_PSB_Right (2L << 0)
 #define FWL_STYLEEXT_PSB_Top (0L << 2)
 #define FWL_STYLEEXT_PSB_VCenter (1L << 2)
 #define FWL_STYLEEXT_PSB_Bottom (2L << 2)
 #define FWL_STYLEEXT_PSB_TextOnly (0L << 4)
 #define FWL_STYLEEXT_PSB_IconOnly (1L << 4)
 #define FWL_STYLEEXT_PSB_TextIcon (2L << 4)
 #define FWL_STYLEEXT_PSB_HLayoutMask (3L << 0)
@@ skipping 13 matching lines @@
 class IFWL_PushButton : public IFWL_Widget {
  public:
   static IFWL_PushButton* Create(const CFWL_WidgetImpProperties& properties,
                                  IFWL_Widget* pOuter);
 
  protected:
   IFWL_PushButton();
 };
 
 #endif  // XFA_FWL_BASEWIDGET_IFWL_PUSHBUTTON_H_