Refcount all the IFX_ stream classes all the time.

xfa/fxfa/parser/cxfa_dataimporter.cpp

 // Copyright 2016 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/cxfa_dataimporter.h"
 
 #include <memory>
 
 #include "core/fxcrt/fx_stream.h"
+#include "third_party/base/ptr_util.h"
 #include "xfa/fde/xml/fde_xml_imp.h"
 #include "xfa/fxfa/fxfa.h"
 #include "xfa/fxfa/fxfa_basic.h"
 #include "xfa/fxfa/parser/cxfa_document.h"
 #include "xfa/fxfa/parser/cxfa_simple_parser.h"
 #include "xfa/fxfa/parser/xfa_object.h"
 
 CXFA_DataImporter::CXFA_DataImporter(CXFA_Document* pDocument)
     : m_pDocument(pDocument) {
   ASSERT(m_pDocument);
 }
 
-bool CXFA_DataImporter::ImportData(IFX_SeekableReadStream* pDataDocument) {
-  std::unique_ptr<CXFA_SimpleParser> pDataDocumentParser(
-      new CXFA_SimpleParser(m_pDocument, false));
+bool CXFA_DataImporter::ImportData(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pDataDocument) {
+  auto pDataDocumentParser =
+      pdfium::MakeUnique<CXFA_SimpleParser>(m_pDocument, false);
   if (pDataDocumentParser->StartParse(pDataDocument, XFA_XDPPACKET_Datasets) !=
       XFA_PARSESTATUS_Ready) {
     return false;
   }
   if (pDataDocumentParser->DoParse(nullptr) < XFA_PARSESTATUS_Done)
     return false;
 
   CXFA_Node* pImportDataRoot = pDataDocumentParser->GetRootNode();
   if (!pImportDataRoot)
     return false;
@@ skipping 16 matching lines @@
   } else {
     CFDE_XMLNode* pXMLNode = pImportDataRoot->GetXMLMappingNode();
     CFDE_XMLNode* pParentXMLNode = pXMLNode->GetNodeItem(CFDE_XMLNode::Parent);
     if (pParentXMLNode)
       pParentXMLNode->RemoveChildNode(pXMLNode);
     pDataModel->InsertChild(pImportDataRoot);
   }
   m_pDocument->DoDataRemerge(false);
   return true;
 }