Convert FWL_ERR into an enum class.

xfa/fwl/theme/cfwl_checkboxtp.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_THEME_CFWL_CHECKBOXTP_H_
 #define XFA_FWL_THEME_CFWL_CHECKBOXTP_H_
 
 #include "xfa/fwl/theme/cfwl_utils.h"
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 
 class CFWL_CheckBoxTP : public CFWL_WidgetTP {
  public:
   CFWL_CheckBoxTP();
   virtual ~CFWL_CheckBoxTP();
   virtual FX_BOOL IsValidWidget(IFWL_Widget* pWidget);
   virtual uint32_t SetThemeID(IFWL_Widget* pWidget,
                               uint32_t dwThemeID,
                               FX_BOOL bChildren = TRUE);
   virtual FX_BOOL DrawText(CFWL_ThemeText* pParams);
   virtual FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams);
-  virtual FWL_ERR Initialize();
-  virtual FWL_ERR Finalize();
+  virtual FWL_Error Initialize();
+  virtual FWL_Error Finalize();
 
  protected:
   void DrawBoxBk(IFWL_Widget* pWidget,
                  CFX_Graphics* pGraphics,
                  const CFX_RectF* pRect,
                  uint32_t dwStates,
                  CFX_Matrix* pMatrix = NULL);
   void DrawSign(IFWL_Widget* pWidget,
                 CFX_Graphics* pGraphics,
                 const CFX_RectF* pRtBox,
@@ skipping 40 matching lines @@
     FX_ARGB clrSignCheck;
     FX_ARGB clrSignNeutral;
     FX_ARGB clrSignNeutralNormal;
     FX_ARGB clrSignNeutralHover;
     FX_ARGB clrSignNeutralPressed;
   } * m_pThemeData;
   CFX_Path* m_pCheckPath;
 };
 
 #endif  // XFA_FWL_THEME_CFWL_CHECKBOXTP_H_