Remove Release() { delete this; } in data importer/exporter

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 344 matching lines @@
   uint32_t packetHash = FX_HashCode_GetW(wsPackage, false);
   CXFA_Node* pNode = ToNode(m_pDocument->GetXFAObject(packetHash));
   if (!pNode) {
     return NULL;
   }
   CFDE_XMLNode* pXMLNode = pNode->GetXMLMappingNode();
   return (pXMLNode && pXMLNode->GetType() == FDE_XMLNODE_Element)
              ? static_cast<CFDE_XMLElement*>(pXMLNode)
              : NULL;
 }
+
 FX_BOOL CXFA_FFDoc::SavePackage(const CFX_WideStringC& wsPackage,
                                 IFX_FileWrite* pFile,
                                 CXFA_ChecksumContext* pCSContext) {
-  CXFA_DataExporter* pExport = new CXFA_DataExporter(m_pDocument);
+  std::unique_ptr<CXFA_DataExporter> pExport(
+      new CXFA_DataExporter(m_pDocument));
   uint32_t packetHash = FX_HashCode_GetW(wsPackage, false);
-  CXFA_Node* pNode = NULL;
-  if (packetHash == XFA_HASHCODE_Xfa) {
-    pNode = m_pDocument->GetRoot();
-  } else {
-    pNode = ToNode(m_pDocument->GetXFAObject(packetHash));
-  }
-  FX_BOOL bFlags = FALSE;
-  if (pNode) {
-    CFX_ByteString bsChecksum;
-    if (pCSContext) {
-      pCSContext->GetChecksum(bsChecksum);
-    }
-    bFlags = pExport->Export(
-        pFile, pNode, 0, bsChecksum.GetLength() ? bsChecksum.c_str() : NULL);
-  } else {
-    bFlags = pExport->Export(pFile);
-  }
-  pExport->Release();
-  return bFlags;
+  CXFA_Node* pNode = packetHash == XFA_HASHCODE_Xfa
+                         ? m_pDocument->GetRoot()
+                         : ToNode(m_pDocument->GetXFAObject(packetHash));
+  if (!pNode)
+    return pExport->Export(pFile);
+
+  CFX_ByteString bsChecksum;
+  if (pCSContext)
+    pCSContext->GetChecksum(bsChecksum);
+
+  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, ReleaseDeleter<CXFA_DataImporter>>
-      importer(new CXFA_DataImporter(m_pDocument));
-
+  std::unique_ptr<CXFA_DataImporter> importer(
+      new CXFA_DataImporter(m_pDocument));
   return importer->ImportData(pStream);
 }