Add type cast definitions for CPDF_Reference.

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"
@@ skipping 46 matching lines @@
       if ((len = pFile->AppendString(PDF_NameEncode(str))) < 0) {
         return -1;
       }
       offset += len + 1;
       break;
     }
     case PDFOBJ_REFERENCE: {
       if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
         return -1;
       }
-      CPDF_Reference* p = (CPDF_Reference*)pObj;
+      const CPDF_Reference* p = pObj->AsReference();

[Lei Zhang, 2015/10/22 21:26:51]

I think you can just fold |p| into the next line. It should just fit 80 chars /
col. Ditto below.

[dsinclair, 2015/10/26 13:55:44]

Done.

       if ((len = pFile->AppendDWord(p->GetRefObjNum())) < 0) {
         return -1;
       }
       if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) {
         return -1;
       }
       offset += len + 6;
       break;
     }
     case PDFOBJ_ARRAY: {
@@ skipping 1086 matching lines @@
       if ((len = m_File.AppendString(PDF_NameEncode(str))) < 0) {
         return -1;
       }
       m_Offset += len + 1;
       break;
     }
     case PDFOBJ_REFERENCE: {
       if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
         return -1;
       }
-      CPDF_Reference* p = (CPDF_Reference*)pObj;
+      const CPDF_Reference* p = pObj->AsReference();
       if ((len = m_File.AppendDWord(p->GetRefObjNum())) < 0) {
         return -1;
       }
       if (m_File.AppendString(FX_BSTRC(" 0 R")) < 0) {
         return -1;
       }
       m_Offset += len + 5;
       break;
     }
     case PDFOBJ_ARRAY: {
@@ skipping 934 matching lines @@
   m_bNewCrypto = FALSE;
   if (!m_bStandardSecurity) {
     return;
   }
   if (m_pEncryptDict) {
     m_pEncryptDict->Release();
     m_pEncryptDict = NULL;
   }
   m_bStandardSecurity = FALSE;
 }