Break xfa_parser_imp apart

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 "xfa/fde/xml/fde_xml_imp.h"
+
+class IFX_Stream;
+class IFX_Pause;
+
+class CXFA_XMLParser : public CFDE_XMLParser {
+ public:
+  CXFA_XMLParser(CFDE_XMLNode* pRoot, IFX_Stream* pStream);
+  ~CXFA_XMLParser() override;
+
+  // CFDE_XMLParser
+  void Release() override;
+  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;
+  IFX_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_