Convert FWL_ERR into an enum class.

xfa/fwl/lightwidget/cfwl_barcode.cpp

 // 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
 
 #include "xfa/fwl/lightwidget/cfwl_barcode.h"
 
 #include <memory>
 
 CFWL_Barcode* CFWL_Barcode::Create() {
   return new CFWL_Barcode;
 }
 
-FWL_ERR CFWL_Barcode::Initialize(const CFWL_WidgetProperties* pProperties) {
+FWL_Error CFWL_Barcode::Initialize(const CFWL_WidgetProperties* pProperties) {
   if (m_pIface)
-    return FWL_ERR_Indefinite;
+    return FWL_Error::Indefinite;
   if (pProperties) {
     *m_pProperties = *pProperties;
   }
   std::unique_ptr<IFWL_Barcode> pBarcode(IFWL_Barcode::Create(
       m_pProperties->MakeWidgetImpProperties(&m_barcodeData)));
-  FWL_ERR ret = pBarcode->Initialize();
-  if (ret != FWL_ERR_Succeeded) {
+  FWL_Error ret = pBarcode->Initialize();
+  if (ret != FWL_Error::Succeeded) {
     return ret;
   }
   m_pIface = pBarcode.release();
   CFWL_Widget::Initialize();
-  return FWL_ERR_Succeeded;
+  return FWL_Error::Succeeded;
 }
 
 CFWL_Barcode::CFWL_Barcode() {}
 
 CFWL_Barcode::~CFWL_Barcode() {}
 
 void CFWL_Barcode::SetType(BC_TYPE type) {
   if (!m_pIface)
     return;
   static_cast<IFWL_Barcode*>(m_pIface)->SetType(type);
 }
 
 FX_BOOL CFWL_Barcode::IsProtectedType() {
   if (!m_pIface)
     return 0;
   return static_cast<IFWL_Barcode*>(m_pIface)->IsProtectedType();
 }
-FWL_ERR CFWL_Barcode::CFWL_BarcodeDP::GetCaption(IFWL_Widget* pWidget,
-                                                 CFX_WideString& wsCaption) {
-  return FWL_ERR_Succeeded;
+FWL_Error CFWL_Barcode::CFWL_BarcodeDP::GetCaption(IFWL_Widget* pWidget,
+                                                   CFX_WideString& wsCaption) {
+  return FWL_Error::Succeeded;
 }