Use unique_ptr for CXFA_XMLParser.

xfa/fxfa/parser/cxfa_xml_parser.h

 // 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
 
 #ifndef XFA_FXFA_PARSER_CXFA_XML_PARSER_H_
 #define XFA_FXFA_PARSER_CXFA_XML_PARSER_H_
 
 #include <memory>
 
 #include "xfa/fde/xml/fde_xml_imp.h"
 
 class IFGAS_Stream;
 class IFX_Pause;
 
-class CXFA_XMLParser : public CFDE_XMLParser {
+class CXFA_XMLParser : public IFDE_XMLParser {
  public:
   CXFA_XMLParser(CFDE_XMLNode* pRoot,
                  const CFX_RetainPtr<IFGAS_Stream>& pStream);
   ~CXFA_XMLParser() override;
 
-  // CFDE_XMLParser
-  void Release() override;
+  // IFDE_XMLParser
   int32_t DoParser(IFX_Pause* pPause) override;
 
   FX_FILESIZE m_nStart[2];
   size_t m_nSize[2];
   FX_FILESIZE m_nElementStart;
   uint16_t m_dwCheckStatus;
   uint16_t m_dwCurrentCheckStatus;
 
  protected:
   CFDE_XMLNode* m_pRoot;
   CFX_RetainPtr<IFGAS_Stream> m_pStream;
   std::unique_ptr<CFDE_XMLSyntaxParser, ReleaseDeleter<CFDE_XMLSyntaxParser>>
       m_pParser;
   CFDE_XMLNode* m_pParent;
   CFDE_XMLNode* m_pChild;
   CFX_StackTemplate<CFDE_XMLNode*> m_NodeStack;
   CFX_WideString m_ws1;
   CFX_WideString m_ws2;
   FDE_XmlSyntaxResult m_syntaxParserResult;
 };
 
 #endif  // XFA_FXFA_PARSER_CXFA_XML_PARSER_H_