Enable security removal in FPDF_Doc_Save

core/src/fpdfapi/fpdf_edit/fpdf_edit_create.cpp

 // 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
 
 #include "../../../include/fpdfapi/fpdf_serial.h"
 #include "editint.h"
 #define PDF_OBJECTSTREAM_MAXLENGTH      (256 * 1024)
 #define PDF_XREFSTREAM_MAXSIZE          10000
 extern void FlateEncode(const FX_BYTE* src_buf, FX_DWORD src_data, FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
 extern void FlateEncode(FX_LPCBYTE src_buf, FX_DWORD src_size, int predictor, int Colors, int BitsPerComponent, int Columns,
                         FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
 extern FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict);
@@ skipping 2091 matching lines @@
     return m_iStage;
 }
 FX_BOOL CPDF_Creator::SetFileVersion(FX_INT32 fileVersion )
 {
     if (fileVersion < 10 || fileVersion > 17) {
         return FALSE;
     }
     m_FileVersion = fileVersion;
     return TRUE;
 }
+void CPDF_Creator::RemoveSecurity()
+{
+    ResetStandardSecurity();
+    m_bSecurityChanged = TRUE;
+    m_pEncryptDict = NULL;
+    m_pCryptoHandler = NULL;
+}
 void CPDF_Creator::ResetStandardSecurity()
 {
     if ((m_bStandardSecurity || m_bNewCrypto) && m_pCryptoHandler) {
         delete m_pCryptoHandler;
         m_pCryptoHandler = NULL;
     }
     m_bNewCrypto = FALSE;
     if (!m_bStandardSecurity) {
         return;
     }
     if (m_pEncryptDict) {
         m_pEncryptDict->Release();
         m_pEncryptDict = NULL;
     }
     m_bStandardSecurity = FALSE;
 }