Convert XFA_ELEMENT to an enum class

xfa/fxfa/app/xfa_ffdoc.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/fxfa/include/xfa_ffdoc.h"
 
 #include <algorithm>
 
@@ skipping 274 matching lines @@
   }
   return iStatus;
 }
 void CXFA_FFDoc::StopLoad() {
   m_pApp->GetXFAFontMgr()->LoadDocFonts(this);
   m_dwDocType = XFA_DOCTYPE_Static;
   CXFA_Node* pConfig = ToNode(m_pDocument->GetXFAObject(XFA_HASHCODE_Config));
   if (!pConfig) {
     return;
   }
-  CXFA_Node* pAcrobat = pConfig->GetFirstChildByClass(XFA_ELEMENT_Acrobat);
+  CXFA_Node* pAcrobat = pConfig->GetFirstChildByClass(XFA_Element::Acrobat);
   if (!pAcrobat) {
     return;
   }
-  CXFA_Node* pAcrobat7 = pAcrobat->GetFirstChildByClass(XFA_ELEMENT_Acrobat7);
+  CXFA_Node* pAcrobat7 = pAcrobat->GetFirstChildByClass(XFA_Element::Acrobat7);
   if (!pAcrobat7) {
     return;
   }
   CXFA_Node* pDynamicRender =
-      pAcrobat7->GetFirstChildByClass(XFA_ELEMENT_DynamicRender);
+      pAcrobat7->GetFirstChildByClass(XFA_Element::DynamicRender);
   if (!pDynamicRender) {
     return;
   }
   CFX_WideString wsType;
   if (pDynamicRender->TryContent(wsType) && wsType == FX_WSTRC(L"required")) {
     m_dwDocType = XFA_DOCTYPE_Dynamic;
   }
 }
 
 CXFA_FFDocView* CXFA_FFDoc::CreateDocView(uint32_t dwView) {
@@ skipping 173 matching lines @@
 
   return !!pExport->Export(
       pFile, pNode, 0, bsChecksum.GetLength() ? bsChecksum.c_str() : nullptr);
 }
 
 FX_BOOL CXFA_FFDoc::ImportData(IFX_FileRead* pStream, FX_BOOL bXDP) {
   std::unique_ptr<CXFA_DataImporter> importer(
       new CXFA_DataImporter(m_pDocument));
   return importer->ImportData(pStream);
 }