Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/parser/cfdf_document.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 "core/fpdfapi/parser/cfdf_document.h"
 
 #include "core/fpdfapi/edit/cpdf_creator.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_syntax_parser.h"
 #include "third_party/base/ptr_util.h"
 
 CFDF_Document::CFDF_Document()
     : CPDF_IndirectObjectHolder(),
       m_pRootDict(nullptr),
       m_pFile(nullptr),
       m_bOwnFile(FALSE),
       m_pByteStringPool(pdfium::MakeUnique<CFX_ByteStringPool>()) {}
 
 CFDF_Document::~CFDF_Document() {
   if (m_bOwnFile && m_pFile)
     m_pFile->Release();
   m_pByteStringPool.DeleteObject();  // Make weak.
 }
 
 CFDF_Document* CFDF_Document::CreateNewDoc() {
   CFDF_Document* pDoc = new CFDF_Document;
-  pDoc->m_pRootDict = new CPDF_Dictionary(pDoc->GetByteStringPool());
-  pDoc->AddIndirectObject(pDoc->m_pRootDict);
+  pDoc->m_pRootDict = pDoc->AddIndirectDictionary(pDoc->GetByteStringPool());
   pDoc->m_pRootDict->SetFor("FDF",
                             new CPDF_Dictionary(pDoc->GetByteStringPool()));
   return pDoc;
 }
 
 CFDF_Document* CFDF_Document::ParseFile(IFX_FileRead* pFile, FX_BOOL bOwnFile) {
   if (!pFile)
     return nullptr;
 
   std::unique_ptr<CFDF_Document> pDoc(new CFDF_Document);
@@ skipping 21 matching lines @@
         break;
 
       word = parser.GetNextWord(nullptr);
       if (word != "obj")
         break;
 
       CPDF_Object* pObj = parser.GetObject(this, objnum, 0, true);
       if (!pObj)
         break;
 
-      ReplaceIndirectObjectIfHigherGeneration(objnum, pObj);
+      // TODO(tsepez): check |pObj| ownership.
+      ReplaceIndirectObjectIfHigherGeneration(objnum, UniqueObject(pObj));
       word = parser.GetNextWord(nullptr);
       if (word != "endobj")
         break;
     } else {
       if (word != "trailer")
         break;
 
       if (CPDF_Dictionary* pMainDict =
               ToDictionary(parser.GetObject(this, 0, 0, true))) {
         m_pRootDict = pMainDict->GetDictFor("Root");
@@ skipping 10 matching lines @@
 
   buf << "%FDF-1.2\r\n";
   for (const auto& pair : *this)
     buf << pair.first << " 0 obj\r\n"
         << pair.second.get() << "\r\nendobj\r\n\r\n";
 
   buf << "trailer\r\n<</Root " << m_pRootDict->GetObjNum()
       << " 0 R>>\r\n%%EOF\r\n";
   return TRUE;
 }