Break xfa_parser_imp apart

xfa/fxfa/parser/cxfa_document_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_DOCUMENT_PARSER_H_
+#define XFA_FXFA_PARSER_CXFA_DOCUMENT_PARSER_H_
+
+#include <memory>
+
+#include "xfa/fxfa/parser/cxfa_simple_parser.h"
+
+class CFDE_XMLDoc;
+class CXFA_Document;
+class CXFA_FFNotify;
+class CXFA_Notify;
+class IFX_FileRead;
+class IFX_Pause;
+
+class CXFA_DocumentParser {
+ public:
+  explicit CXFA_DocumentParser(CXFA_FFNotify* pNotify);
+  ~CXFA_DocumentParser();
+
+  int32_t StartParse(IFX_FileRead* pStream, XFA_XDPPACKET ePacketID);
+  int32_t DoParse(IFX_Pause* pPause);
+
+  CFDE_XMLDoc* GetXMLDoc() const;
+  CXFA_FFNotify* GetNotify() const;
+  CXFA_Document* GetDocument() const;
+  void CloseParser();
+
+ protected:
+  CXFA_SimpleParser m_nodeParser;
+  CXFA_FFNotify* m_pNotify;
+  std::unique_ptr<CXFA_Document> m_pDocument;
+};
+
+#endif  // XFA_FXFA_PARSER_CXFA_DOCUMENT_PARSER_H_