[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, 7 insertions, 18 deletions

diff --git a/xfa/fxfa/parser/cxfa_dataexporter.cpp b/xfa/fxfa/parser/cxfa_dataexporter.cpp
index 4f10d0ddfe..7773aeb190 100644
--- a/xfa/fxfa/parser/cxfa_dataexporter.cpp
+++ b/xfa/fxfa/parser/cxfa_dataexporter.cpp
@@ -15,35 +15,24 @@
 #include "xfa/fxfa/parser/cxfa_node.h"
 #include "xfa/fxfa/parser/xfa_utils.h"
 
-CXFA_DataExporter::CXFA_DataExporter(CXFA_Document* pDocument)
-    : m_pDocument(pDocument) {
-  ASSERT(m_pDocument);
-}
-
-CXFA_DataExporter::~CXFA_DataExporter() {}
+CXFA_DataExporter::CXFA_DataExporter() = default;
 
-bool CXFA_DataExporter::Export(const RetainPtr<IFX_SeekableStream>& pWrite) {
-  return Export(pWrite, m_pDocument->GetRoot(), 0, nullptr);
-}
+CXFA_DataExporter::~CXFA_DataExporter() = default;
 
 bool CXFA_DataExporter::Export(const RetainPtr<IFX_SeekableStream>& pWrite,
-                               CXFA_Node* pNode,
-                               uint32_t dwFlag,
-                               const char* pChecksum) {
+                               CXFA_Node* pNode) {
   ASSERT(pWrite);
   if (!pWrite)
     return false;
 
   auto pStream = pdfium::MakeRetain<CFX_SeekableStreamProxy>(pWrite, true);
   pStream->SetCodePage(FX_CODEPAGE_UTF8);
-  return Export(pStream, pNode, dwFlag, pChecksum);
+  return Export(pStream, pNode);
 }
 
 bool CXFA_DataExporter::Export(
     const RetainPtr<CFX_SeekableStreamProxy>& pStream,
-    CXFA_Node* pNode,
-    uint32_t dwFlag,
-    const char* pChecksum) {
+    CXFA_Node* pNode) {
   if (pNode->IsModelNode()) {
     switch (pNode->GetPacketType()) {
       case XFA_PacketType::Xdp: {
@@ -51,7 +40,7 @@ bool CXFA_DataExporter::Export(
             L"<xdp:xdp xmlns:xdp=\"http://ns.adobe.com/xdp/\">");
         for (CXFA_Node* pChild = pNode->GetFirstChild(); pChild;
              pChild = pChild->GetNextSibling()) {
-          Export(pStream, pChild, dwFlag, pChecksum);
+          Export(pStream, pChild);
         }
         pStream->WriteString(L"</xdp:xdp\n>");
         break;
@@ -69,7 +58,7 @@ bool CXFA_DataExporter::Export(
         break;
       }
       case XFA_PacketType::Form: {
-        XFA_DataExporter_RegenerateFormFile(pNode, pStream, pChecksum, false);
+        XFA_DataExporter_RegenerateFormFile(pNode, pStream, false);
         break;
       }
       case XFA_PacketType::Template: