[xfa] Remove form checksum abilities

This CL removes the code for verifying and creating checksums associated
with form elements in XFA documents. This was the only code requiring
the SAXReader which has also been removed.

According to the XFA spec and application can decide which parts of the
signatures are supported. This feature is being removed until we
determine if/when it is needed.

Bug: pdfium:1063
Change-Id: Iec2261282340f8fc72a1225d2e0d3e6ddf05edcb
Reviewed-on: https://pdfium-review.googlesource.com/30150
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 0 insertions, 48 deletions

diff --git a/core/fxcrt/xml/cfx_saxreaderhandler.h b/core/fxcrt/xml/cfx_saxreaderhandler.h
deleted file mode 100644
index 263008f1ff..0000000000
--- a/core/fxcrt/xml/cfx_saxreaderhandler.h
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2017 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 CORE_FXCRT_XML_CFX_SAXREADERHANDLER_H_
-#define CORE_FXCRT_XML_CFX_SAXREADERHANDLER_H_
-
-#include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/xml/cfx_saxcontext.h"
-#include "core/fxcrt/xml/cfx_saxreader.h"
-
-class CFX_ChecksumContext;
-
-class CFX_SAXReaderHandler : public CFX_SAXReader::HandlerIface {
- public:
-  explicit CFX_SAXReaderHandler(CFX_ChecksumContext* pContext);
-  ~CFX_SAXReaderHandler() override;
-
-  CFX_SAXContext* OnTagEnter(const ByteStringView& bsTagName,
-                             CFX_SAXItem::Type eType,
-                             uint32_t dwStartPos) override;
-  void OnTagAttribute(CFX_SAXContext* pTag,
-                      const ByteStringView& bsAttri,
-                      const ByteStringView& bsValue) override;
-  void OnTagBreak(CFX_SAXContext* pTag) override;
-  void OnTagData(CFX_SAXContext* pTag,
-                 CFX_SAXItem::Type eType,
-                 const ByteStringView& bsData,
-                 uint32_t dwStartPos) override;
-  void OnTagClose(CFX_SAXContext* pTag, uint32_t dwEndPos) override;
-  void OnTagEnd(CFX_SAXContext* pTag,
-                const ByteStringView& bsTagName,
-                uint32_t dwEndPos) override;
-  void OnTargetData(CFX_SAXContext* pTag,
-                    CFX_SAXItem::Type eType,
-                    const ByteStringView& bsData,
-                    uint32_t dwStartPos) override;
-
- private:
-  void UpdateChecksum(bool bCheckSpace);
-
-  CFX_ChecksumContext* m_pContext;
-  CFX_SAXContext m_SAXContext;
-};
-
-#endif  // CORE_FXCRT_XML_CFX_SAXREADERHANDLER_H_