Return unique_ptr from CPDF_Object::Clone().

core/fpdfapi/parser/cpdf_array.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_ARRAY_H_
 #define CORE_FPDFAPI_PARSER_CPDF_ARRAY_H_
 
 #include <set>
 #include <vector>
 
 #include "core/fpdfapi/parser/cpdf_indirect_object_holder.h"
 #include "core/fpdfapi/parser/cpdf_object.h"
 #include "core/fxcrt/fx_basic.h"
 #include "core/fxcrt/fx_coordinates.h"
 
 class CPDF_Array : public CPDF_Object {
  public:
   using iterator = std::vector<CPDF_Object*>::iterator;
   using const_iterator = std::vector<CPDF_Object*>::const_iterator;
 
   CPDF_Array();
   ~CPDF_Array() override;
 
-  // CPDF_Object.
+  // CPDF_Object:
   Type GetType() const override;
-  CPDF_Object* Clone() const override;
+  std::unique_ptr<CPDF_Object> Clone() const override;
   bool IsArray() const override;
   CPDF_Array* AsArray() override;
   const CPDF_Array* AsArray() const override;
 
   bool IsEmpty() const { return m_Objects.empty(); }
   size_t GetCount() const { return m_Objects.size(); }
   CPDF_Object* GetObjectAt(size_t index) const;
   CPDF_Object* GetDirectObjectAt(size_t index) const;
   CFX_ByteString GetStringAt(size_t index) const;
   int GetIntegerAt(size_t index) const;
@@ skipping 16 matching lines @@
   void AddString(const CFX_ByteString& str);
   void AddName(const CFX_ByteString& str);
   void AddReference(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum);
 
   iterator begin() { return m_Objects.begin(); }
   iterator end() { return m_Objects.end(); }
   const_iterator begin() const { return m_Objects.begin(); }
   const_iterator end() const { return m_Objects.end(); }
 
  protected:
-  CPDF_Object* CloneNonCyclic(
+  std::unique_ptr<CPDF_Object> CloneNonCyclic(
       bool bDirect,
       std::set<const CPDF_Object*>* pVisited) const override;
 
   std::vector<CPDF_Object*> m_Objects;
 };
 
 inline CPDF_Array* ToArray(CPDF_Object* obj) {
   return obj ? obj->AsArray() : nullptr;
 }
 
 inline const CPDF_Array* ToArray(const CPDF_Object* obj) {
   return obj ? obj->AsArray() : nullptr;
 }
 
 inline std::unique_ptr<CPDF_Array> ToArray(std::unique_ptr<CPDF_Object> obj) {
   CPDF_Array* pArray = ToArray(obj.get());
   if (!pArray)
     return nullptr;
   obj.release();
   return std::unique_ptr<CPDF_Array>(pArray);
 }
 
 #endif  // CORE_FPDFAPI_PARSER_CPDF_ARRAY_H_