Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/basewidget/ifwl_picturebox.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_PICTUREBOX_H_
 #define XFA_FWL_BASEWIDGET_IFWL_PICTUREBOX_H_
 
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
 #include "xfa/fwl/core/fwl_error.h"
 
 #define FWL_CLASS_PictureBox L"FWL_PICTUREBOX"
-#define FWL_CLASSHASH_PictureBox 2974721741
 #define FWL_STYLEEXT_PTB_Left 0L << 0
 #define FWL_STYLEEXT_PTB_Center 1L << 0
 #define FWL_STYLEEXT_PTB_Right 2L << 0
 #define FWL_STYLEEXT_PTB_Top 0L << 2
 #define FWL_STYLEEXT_PTB_Vcenter 1L << 2
 #define FWL_STYLEEXT_PTB_Bottom 2L << 2
 #define FWL_STYLEEXT_PTB_Normal 0L << 4
 #define FWL_STYLEEXT_PTB_AutoSize 1L << 4
 #define FWL_STYLEEXT_PTB_StretchImage 2L << 4
 #define FWL_STYLEEXT_PTB_StretchHImage 3L << 4
@@ skipping 17 matching lines @@
 class IFWL_PictureBox : public IFWL_Widget {
  public:
   static IFWL_PictureBox* Create(const CFWL_WidgetImpProperties& properties,
                                  IFWL_Widget* pOuter);
 
  protected:
   IFWL_PictureBox();
 };
 
 #endif  // XFA_FWL_BASEWIDGET_IFWL_PICTUREBOX_H_