Update GetClassID to GetElementType

xfa/fxfa/parser/xfa_document_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 "core/fxcrt/include/fx_ext.h"
 #include "xfa/fxfa/app/xfa_ffnotify.h"
 #include "xfa/fxfa/parser/xfa_basic_imp.h"
 #include "xfa/fxfa/parser/xfa_doclayout.h"
@@ skipping 272 matching lines @@
   return NULL;
 }
 static void XFA_ProtoMerge_MergeNodeRecurse(CXFA_Document* pDocument,
                                             CXFA_Node* pDestNodeParent,
                                             CXFA_Node* pProtoNode) {
   CXFA_Node* pExistingNode = NULL;
   for (CXFA_Node* pFormChild =
            pDestNodeParent->GetNodeItem(XFA_NODEITEM_FirstChild);
        pFormChild;
        pFormChild = pFormChild->GetNodeItem(XFA_NODEITEM_NextSibling)) {
-    if (pFormChild->GetClassID() == pProtoNode->GetClassID() &&
+    if (pFormChild->GetElementType() == pProtoNode->GetElementType() &&
         pFormChild->GetNameHash() == pProtoNode->GetNameHash() &&
         pFormChild->IsUnusedNode()) {
       pFormChild->ClearFlag(XFA_NodeFlag_UnusedNode);
       pExistingNode = pFormChild;
       break;
     }
   }
   if (pExistingNode) {
     pExistingNode->SetTemplateNode(pProtoNode);
     for (CXFA_Node* pTemplateChild =
@@ skipping 103 matching lines @@
       if (!mIDMap.Lookup(FX_HashCode_GetW(wsID, false), pProtoNode)) {
         continue;
       }
     }
     if (!pProtoNode) {
       continue;
     }
     XFA_ProtoMerge_MergeNode(this, pUseHrefNode, pProtoNode);
   }
 }