Refcount all the IFX_ stream classes all the time.

xfa/fxfa/parser/cxfa_dataimporter.cpp

Index: xfa/fxfa/parser/cxfa_dataimporter.cpp
diff --git a/xfa/fxfa/parser/cxfa_dataimporter.cpp b/xfa/fxfa/parser/cxfa_dataimporter.cpp
index c0c798dfe60f9654d9f93b17b80c9ebc79e1dfd7..0199028ecd6fdf3f4d6f8c38fb10933017d85da6 100644
--- a/xfa/fxfa/parser/cxfa_dataimporter.cpp
+++ b/xfa/fxfa/parser/cxfa_dataimporter.cpp
@@ -9,6 +9,7 @@
 #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"
@@ -21,9 +22,10 @@ CXFA_DataImporter::CXFA_DataImporter(CXFA_Document* 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;