Add method to convert an indirect object in a dictionary

core/fpdfapi/parser/cpdf_dictionary.cpp

 // Copyright 2016 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 "core/fpdfapi/parser/cpdf_dictionary.h"
 
 #include <set>
 #include <utility>
@@ skipping 174 matching lines @@
   if (it->second == pObj)
     return;
   it->second->Release();
 
   if (pObj)
     it->second = pObj;
   else
     m_Map.erase(it);
 }
 
+void CPDF_Dictionary::ConvertToIndirectObjectFor(
+    const CFX_ByteString& key,
+    CPDF_IndirectObjectHolder* pHolder) {
+  auto it = m_Map.find(key);
+  if (it == m_Map.end() || it->second->IsReference())
+    return;
+
+  uint32_t objnum = pHolder->AddIndirectObject(it->second);
+  it->second = new CPDF_Reference(pHolder, objnum);
+}
+
 void CPDF_Dictionary::RemoveFor(const CFX_ByteString& key) {
   auto it = m_Map.find(key);
   if (it == m_Map.end())
     return;
 
   it->second->Release();
   m_Map.erase(it);
 }
 
 void CPDF_Dictionary::ReplaceKey(const CFX_ByteString& oldkey,
@@ skipping 61 matching lines @@
   pArray->AddNumber(matrix.c);
   pArray->AddNumber(matrix.d);
   pArray->AddNumber(matrix.e);
   pArray->AddNumber(matrix.f);
   SetFor(key, pArray);
 }
 
 CFX_ByteString CPDF_Dictionary::MaybeIntern(const CFX_ByteString& str) {
   return m_pPool ? m_pPool->Intern(str) : str;
 }