Remove IXFA_* interfaces.

xfa/fxfa/app/xfa_checksum.h

-// 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
-
-#ifndef XFA_FXFA_APP_XFA_CHECKSUM_H_
-#define XFA_FXFA_APP_XFA_CHECKSUM_H_
-
-#include "xfa/fgas/xml/fgas_sax.h"
-#include "xfa/include/fxfa/fxfa.h"
-
-class CXFA_SAXReaderHandler;
-class CXFA_ChecksumContext;
-
-class CXFA_SAXContext {
- public:
-  CXFA_SAXContext() : m_eNode(FX_SAXNODE_Unknown) {}
-  CFX_ByteTextBuf m_TextBuf;
-  CFX_ByteString m_bsTagName;
-  FX_SAXNODE m_eNode;
-};
-class CXFA_SAXReaderHandler : public IFX_SAXReaderHandler {
- public:
-  CXFA_SAXReaderHandler(CXFA_ChecksumContext* pContext);
-  virtual ~CXFA_SAXReaderHandler();
-  virtual void* OnTagEnter(const CFX_ByteStringC& bsTagName,
-                           FX_SAXNODE eType,
-                           uint32_t dwStartPos);
-  virtual void OnTagAttribute(void* pTag,
-                              const CFX_ByteStringC& bsAttri,
-                              const CFX_ByteStringC& bsValue);
-  virtual void OnTagBreak(void* pTag);
-  virtual void OnTagData(void* pTag,
-                         FX_SAXNODE eType,
-                         const CFX_ByteStringC& bsData,
-                         uint32_t dwStartPos);
-  virtual void OnTagClose(void* pTag, uint32_t dwEndPos);
-  virtual void OnTagEnd(void* pTag,
-                        const CFX_ByteStringC& bsTagName,
-                        uint32_t dwEndPos);
-
-  virtual void OnTargetData(void* pTag,
-                            FX_SAXNODE eType,
-                            const CFX_ByteStringC& bsData,
-                            uint32_t dwStartPos);
-
- protected:
-  void UpdateChecksum(FX_BOOL bCheckSpace);
-  CXFA_ChecksumContext* m_pContext;
-  CXFA_SAXContext m_SAXContext;
-};
-
-class CXFA_ChecksumContext : public IXFA_ChecksumContext {
- public:
-  CXFA_ChecksumContext();
-  virtual ~CXFA_ChecksumContext();
-  virtual void Release() { delete this; }
-  virtual FX_BOOL StartChecksum();
-  virtual FX_BOOL UpdateChecksum(IFX_FileRead* pSrcFile,
-                                 FX_FILESIZE offset = 0,
-                                 size_t size = 0);
-  virtual void FinishChecksum();
-  virtual void GetChecksum(CFX_ByteString& bsChecksum);
-  void Update(const CFX_ByteStringC& bsText);
-
- protected:
-  IFX_SAXReader* m_pSAXReader;
-  uint8_t* m_pByteContext;
-  CFX_ByteString m_bsChecksum;
-};
-
-#endif  // XFA_FXFA_APP_XFA_CHECKSUM_H_