Merge to XFA: Extern in .cpp files is a code smell, part 1.

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/fxcrt/fx_ext.h"
 #include "../../../include/fpdfapi/fpdf_serial.h"
+#include "../../../include/fpdfapi/fpdf_parser.h"
 #include "editint.h"
 
 #define PDF_OBJECTSTREAM_MAXLENGTH (256 * 1024)
 #define PDF_XREFSTREAM_MAXSIZE 10000
-extern void FlateEncode(const uint8_t* src_buf,
-                        FX_DWORD src_data,
-                        uint8_t*& dest_buf,
-                        FX_DWORD& dest_size);
-extern void FlateEncode(const uint8_t* src_buf,
-                        FX_DWORD src_size,
-                        int predictor,
-                        int Colors,
-                        int BitsPerComponent,
-                        int Columns,
-                        uint8_t*& dest_buf,
-                        FX_DWORD& dest_size);
-extern FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict);
+
 int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
                                 CFX_FileBufferArchive* pFile,
                                 FX_FILESIZE& offset) {
   int32_t len = 0;
   if (pObj == NULL) {
     if (pFile->AppendString(FX_BSTRC(" null")) < 0) {
       return -1;
     }
     offset += 5;
     return 1;
@@ skipping 2101 matching lines @@
   m_bNewCrypto = FALSE;
   if (!m_bStandardSecurity) {
     return;
   }
   if (m_pEncryptDict) {
     m_pEncryptDict->Release();
     m_pEncryptDict = NULL;
   }
   m_bStandardSecurity = FALSE;
 }