Convert XFA_ELEMENT to an enum class

xfa/fxfa/parser/xfa_document_layout_imp.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/parser/xfa_document_layout_imp.h"
 
 #include "xfa/fxfa/parser/xfa_basic_imp.h"
 #include "xfa/fxfa/parser/xfa_doclayout.h"
@@ skipping 37 matching lines @@
 
   delete m_pRootItemLayoutProcessor;
   m_pRootItemLayoutProcessor = nullptr;
   m_nProgressCounter = 0;
   CXFA_Node* pFormPacketNode =
       ToNode(m_pDocument->GetXFAObject(XFA_HASHCODE_Form));
   if (!pFormPacketNode) {
     return -1;
   }
   CXFA_Node* pFormRoot =
-      pFormPacketNode->GetFirstChildByClass(XFA_ELEMENT_Subform);
+      pFormPacketNode->GetFirstChildByClass(XFA_Element::Subform);
   if (!pFormRoot) {
     return -1;
   }
   if (!m_pLayoutPageMgr) {
     m_pLayoutPageMgr = new CXFA_LayoutPageMgr(this);
   }
   if (!m_pLayoutPageMgr->InitLayoutPage(pFormRoot)) {
     return -1;
   }
   if (!m_pLayoutPageMgr->PrepareFirstPage(pFormRoot)) {
@@ skipping 102 matching lines @@
 }
 int32_t CXFA_ContainerLayoutItem::GetPageIndex() const {
   return m_pFormNode->GetDocument()
       ->GetLayoutProcessor()
       ->GetLayoutPageMgr()
       ->GetPageIndex(this);
 }
 
 void CXFA_ContainerLayoutItem::GetPageSize(CFX_SizeF& size) const {
   size.clear();
-  CXFA_Node* pMedium = m_pFormNode->GetFirstChildByClass(XFA_ELEMENT_Medium);
+  CXFA_Node* pMedium = m_pFormNode->GetFirstChildByClass(XFA_Element::Medium);
   if (!pMedium)
     return;
 
   size = CFX_SizeF(pMedium->GetMeasure(XFA_ATTRIBUTE_Short).ToUnit(XFA_UNIT_Pt),
                    pMedium->GetMeasure(XFA_ATTRIBUTE_Long).ToUnit(XFA_UNIT_Pt));
   if (pMedium->GetEnum(XFA_ATTRIBUTE_Orientation) ==
       XFA_ATTRIBUTEENUM_Landscape) {
     size = CFX_SizeF(size.y, size.x);
   }
 }
 
 CXFA_Node* CXFA_ContainerLayoutItem::GetMasterPage() const {
   return m_pFormNode;
 }
 CXFA_ContentLayoutItem::CXFA_ContentLayoutItem(CXFA_Node* pNode)
     : CXFA_LayoutItem(pNode, TRUE),
       m_pPrev(NULL),
       m_pNext(NULL),
       m_dwStatus(0) {}
 CXFA_ContentLayoutItem::~CXFA_ContentLayoutItem() {
   if (m_pFormNode->GetUserData(XFA_LAYOUTITEMKEY) == this) {
     m_pFormNode->SetUserData(XFA_LAYOUTITEMKEY, NULL);
   }
 }