Use unique_ptr return from CPDF_Parser::ParseIndirectObject()

core/fpdfapi/parser/cfdf_document.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 "core/fpdfapi/parser/cfdf_document.h"
 
 #include "core/fpdfapi/edit/cpdf_creator.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
@@ skipping 51 matching lines @@
         break;
 
       word = parser.GetNextWord(&bNumber);
       if (!bNumber)
         break;
 
       word = parser.GetNextWord(nullptr);
       if (word != "obj")
         break;
 
-      auto pObj = pdfium::WrapUnique<CPDF_Object>(
-          parser.GetObject(this, objnum, 0, true));
+      std::unique_ptr<CPDF_Object> pObj =
+          parser.GetObject(this, objnum, 0, true);
       if (!pObj)
         break;
 
       ReplaceIndirectObjectIfHigherGeneration(objnum, std::move(pObj));
       word = parser.GetNextWord(nullptr);
       if (word != "endobj")
         break;
     } else {
       if (word != "trailer")
         break;
 
-      if (CPDF_Dictionary* pMainDict =
-              ToDictionary(parser.GetObject(this, 0, 0, true))) {
+      std::unique_ptr<CPDF_Dictionary> pMainDict =
+          ToDictionary(parser.GetObject(this, 0, 0, true));
+      if (pMainDict)
         m_pRootDict = pMainDict->GetDictFor("Root");
-        delete pMainDict;
-      }
+
       break;
     }
   }
 }
 
 bool CFDF_Document::WriteBuf(CFX_ByteTextBuf& buf) const {
   if (!m_pRootDict)
     return false;
 
   buf << "%FDF-1.2\r\n";
   for (const auto& pair : *this)
     buf << pair.first << " 0 obj\r\n"
         << pair.second.get() << "\r\nendobj\r\n\r\n";
 
   buf << "trailer\r\n<</Root " << m_pRootDict->GetObjNum()
       << " 0 R>>\r\n%%EOF\r\n";
   return true;
 }