Remove some WrapUnique() calls by returing unique_ptrs

core/fpdfapi/parser/cpdf_parser.cpp

 // 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
 
 #include "core/fpdfapi/parser/cpdf_parser.h"
 
 #include <algorithm>
 #include <utility>
@@ skipping 1052 matching lines @@
           m_ObjectInfo[offset].type = 255;
         }
       }
     }
     segindex += count;
   }
   return true;
 }
 
 CPDF_Array* CPDF_Parser::GetIDArray() {
-  CPDF_Object* pID = m_pTrailer ? m_pTrailer->GetObjectFor("ID") : nullptr;
+  if (!m_pTrailer)
+    return nullptr;
+
+  CPDF_Object* pID = m_pTrailer->GetObjectFor("ID");
   if (!pID)
     return nullptr;
 
-  if (CPDF_Reference* pRef = pID->AsReference()) {
-    pID = ParseIndirectObject(nullptr, pRef->GetRefObjNum()).release();
-    m_pTrailer->SetFor("ID", pdfium::WrapUnique(pID));
-  }
+  CPDF_Reference* pRef = pID->AsReference();
+  if (!pRef)
+    return ToArray(pID);
+
+  std::unique_ptr<CPDF_Object> pNewObj =
+      ParseIndirectObject(nullptr, pRef->GetRefObjNum());
+  pID = pNewObj.get();
+  m_pTrailer->SetFor("ID", std::move(pNewObj));
   return ToArray(pID);
 }
 
 uint32_t CPDF_Parser::GetRootObjNum() {
   CPDF_Reference* pRef =
       ToReference(m_pTrailer ? m_pTrailer->GetObjectFor("Root") : nullptr);
   return pRef ? pRef->GetRefObjNum() : 0;
 }
 
 uint32_t CPDF_Parser::GetInfoObjNum() {
@@ skipping 480 matching lines @@
   if (!LoadLinearizedAllCrossRefV4(m_LastXRefOffset, m_dwXrefStartObjNum) &&
       !LoadLinearizedAllCrossRefV5(m_LastXRefOffset)) {
     m_LastXRefOffset = 0;
     m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
     return FORMAT_ERROR;
   }
 
   m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
   return SUCCESS;
 }