Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/parser/cpdf_data_avail.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_data_avail.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1753 matching lines @@
       bool bPagePosGot = m_pHintTables->GetPagePos(index, &szPageStartPos,
                                                    &szPageLength, &dwObjNum);
       if (!bPagePosGot)
         return nullptr;
 
       m_syntaxParser.InitParser(m_pFileRead, (uint32_t)szPageStartPos);
       CPDF_Object* pPageDict = ParseIndirectObjectAt(0, dwObjNum, m_pDocument);
       if (!pPageDict)
         return nullptr;
 
-      if (!m_pDocument->ReplaceIndirectObjectIfHigherGeneration(dwObjNum,
-                                                                pPageDict)) {
+      // TODO(tsepez): check |pPageDict| ownership.
+      if (!m_pDocument->ReplaceIndirectObjectIfHigherGeneration(
+              dwObjNum, UniqueObject(pPageDict))) {
         return nullptr;
       }
       return pPageDict->GetDict();
     }
   }
   return m_pDocument->GetPage(index);
 }
 
 CPDF_DataAvail::DocFormStatus CPDF_DataAvail::IsFormAvail(
     DownloadHints* pHints) {
@@ skipping 30 matching lines @@
   return FormAvailable;
 }
 
 CPDF_DataAvail::PageNode::PageNode() : m_type(PDF_PAGENODE_UNKNOWN) {}
 
 CPDF_DataAvail::PageNode::~PageNode() {
   for (int32_t i = 0; i < m_childNode.GetSize(); ++i)
     delete m_childNode[i];
   m_childNode.RemoveAll();
 }