Return unique_ptr from CPDF_Object::Clone().

core/fpdfapi/parser/cpdf_name.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_NAME_H_
 #define CORE_FPDFAPI_PARSER_CPDF_NAME_H_
 
 #include "core/fpdfapi/parser/cpdf_object.h"
 
 class CPDF_Name : public CPDF_Object {
  public:
   explicit CPDF_Name(const CFX_ByteString& str);
   ~CPDF_Name() override;
 
   // CPDF_Object:
   Type GetType() const override;
-  CPDF_Object* Clone() const override;
+  std::unique_ptr<CPDF_Object> Clone() const override;
   CFX_ByteString GetString() const override;
   CFX_WideString GetUnicodeText() const override;
   void SetString(const CFX_ByteString& str) override;
   bool IsName() const override;
   CPDF_Name* AsName() override;
   const CPDF_Name* AsName() const override;
 
  protected:
   CFX_ByteString m_Name;
 };
 
 inline CPDF_Name* ToName(CPDF_Object* obj) {
   return obj ? obj->AsName() : nullptr;
 }
 
 inline const CPDF_Name* ToName(const CPDF_Object* obj) {
   return obj ? obj->AsName() : nullptr;
 }
 
 #endif  // CORE_FPDFAPI_PARSER_CPDF_NAME_H_