Pass object to ReplaceIndirectObjectIfHigherGeneration() by unique_ptr.

core/fpdfapi/parser/cpdf_indirect_object_holder.h

 // 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
 
 #ifndef CORE_FPDFAPI_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_
 #define CORE_FPDFAPI_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_
 
 #include <map>
@@ skipping 10 matching lines @@
 
   CPDF_IndirectObjectHolder();
   virtual ~CPDF_IndirectObjectHolder();
 
   CPDF_Object* GetIndirectObject(uint32_t objnum) const;
   CPDF_Object* GetOrParseIndirectObject(uint32_t objnum);
   void DeleteIndirectObject(uint32_t objnum);
 
   // Take ownership of |pObj|.
   uint32_t AddIndirectObject(CPDF_Object* pObj);
-  bool ReplaceIndirectObjectIfHigherGeneration(uint32_t objnum,
-                                               CPDF_Object* pObj);
+  bool ReplaceIndirectObjectIfHigherGeneration(
+      uint32_t objnum,
+      std::unique_ptr<CPDF_Object> pObj);
 
   uint32_t GetLastObjNum() const { return m_LastObjNum; }
   void SetLastObjNum(uint32_t objnum) { m_LastObjNum = objnum; }
 
   const_iterator begin() const { return m_IndirectObjs.begin(); }
   const_iterator end() const { return m_IndirectObjs.end(); }
 
  protected:
   virtual CPDF_Object* ParseIndirectObject(uint32_t objnum);
 
  private:
   uint32_t m_LastObjNum;
   std::map<uint32_t, std::unique_ptr<CPDF_Object>> m_IndirectObjs;
 };
 
 #endif  // CORE_FPDFAPI_PARSER_CPDF_INDIRECT_OBJECT_HOLDER_H_