Enable security removal in FPDF_Doc_Save

core/include/fpdfapi/fpdf_serial.h

Index: core/include/fpdfapi/fpdf_serial.h
diff --git a/core/include/fpdfapi/fpdf_serial.h b/core/include/fpdfapi/fpdf_serial.h
index 87ec7b5a0500343a431a4168f1f3aaeb6a73d29c..a91870b5a5f67964b0a7af28f62bc382657b164d 100644
--- a/core/include/fpdfapi/fpdf_serial.h
+++ b/core/include/fpdfapi/fpdf_serial.h
@@ -1,7 +1,7 @@
 // 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 _FPDF_SERIAL_
@@ -121,6 +121,8 @@ public:
 
     ~CPDF_Creator();
 
+    void				RemoveSecurity();
+
     FX_BOOL				Create(FX_LPCWSTR filename, FX_DWORD flags = 0);
 
     FX_BOOL				Create(FX_LPCSTR filename, FX_DWORD flags = 0);