Return unique_ptr from CPDF_Object::Clone().

fpdfsdk/fpdf_flatten.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 "public/fpdf_flatten.h"
 
 #include <algorithm>
 
@@ skipping 390 matching lines @@
     if (pAPDic->KeyExist("Rect"))
       rcStream = pAPDic->GetRectFor("Rect");
     else if (pAPDic->KeyExist("BBox"))
       rcStream = pAPDic->GetRectFor("BBox");
 
     if (rcStream.IsEmpty())
       continue;
 
     CPDF_Object* pObj = pAPStream;
     if (pObj->IsInline()) {
-      pObj = pObj->Clone();
-      pDocument->AddIndirectObject(pObj);
+      std::unique_ptr<CPDF_Object> pNew = pObj->Clone();
+      pObj = pNew.get();
+      pDocument->AddIndirectObject(pNew.release());
     }
 
     CPDF_Dictionary* pObjDic = pObj->GetDict();
     if (pObjDic) {
       pObjDic->SetNameFor("Type", "XObject");
       pObjDic->SetNameFor("Subtype", "Form");
     }
 
     CPDF_Dictionary* pXObject = pNewXORes->GetDictFor("XObject");
     if (!pXObject) {
@@ skipping 25 matching lines @@
     sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f,
                  sFormName.c_str());
     sStream += sTemp;
     pNewXObject->SetData(sStream.raw_str(), sStream.GetLength());
   }
   pPageDict->RemoveFor("Annots");
 
   RectArray.RemoveAll();
   return FLATTEN_SUCCESS;
 }