Add ptr_util.h from base until std::make_unique<> available

fpdfsdk/fpdf_dataavail.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_dataavail.h"
 
 #include <memory>
 #include <utility>
 
 #include "core/fpdfapi/fpdf_parser/cpdf_data_avail.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_document.h"
 #include "fpdfsdk/fsdk_define.h"
 #include "public/fpdf_formfill.h"
+#include "third_party/base/ptr_util.h"
 
 // These checks are here because core/ and public/ cannot depend on each other.
 static_assert(CPDF_DataAvail::DataError == PDF_DATA_ERROR,
               "CPDF_DataAvail::DataError value mismatch");
 static_assert(CPDF_DataAvail::DataNotAvailable == PDF_DATA_NOTAVAIL,
               "CPDF_DataAvail::DataNotAvailable value mismatch");
 static_assert(CPDF_DataAvail::DataAvailable == PDF_DATA_AVAIL,
               "CPDF_DataAvail::DataAvailable value mismatch");
 
 static_assert(CPDF_DataAvail::LinearizationUnknown == PDF_LINEARIZATION_UNKNOWN,
@@ skipping 82 matching lines @@
   return static_cast<CFPDF_DataAvail*>(avail);
 }
 
 }  // namespace
 
 DLLEXPORT FPDF_AVAIL STDCALL FPDFAvail_Create(FX_FILEAVAIL* file_avail,
                                               FPDF_FILEACCESS* file) {
   CFPDF_DataAvail* pAvail = new CFPDF_DataAvail;
   pAvail->m_FileAvail.Set(file_avail);
   pAvail->m_FileRead.Set(file);
-  pAvail->m_pDataAvail = WrapUnique(
-      new CPDF_DataAvail(&pAvail->m_FileAvail, &pAvail->m_FileRead, TRUE));
+  pAvail->m_pDataAvail = pdfium::MakeUnique<CPDF_DataAvail>(
+      &pAvail->m_FileAvail, &pAvail->m_FileRead, TRUE);
   return pAvail;
 }
 
 DLLEXPORT void STDCALL FPDFAvail_Destroy(FPDF_AVAIL avail) {
   delete (CFPDF_DataAvail*)avail;
 }
 
 DLLEXPORT int STDCALL FPDFAvail_IsDocAvail(FPDF_AVAIL avail,
                                            FX_DOWNLOADHINTS* hints) {
   if (!avail || !hints)
@@ skipping 49 matching lines @@
   CFPDF_DownloadHintsWrap hints_wrap(hints);
   return CFPDFDataAvailFromFPDFAvail(avail)->m_pDataAvail->IsFormAvail(
       &hints_wrap);
 }
 
 DLLEXPORT int STDCALL FPDFAvail_IsLinearized(FPDF_AVAIL avail) {
   if (!avail)
     return PDF_LINEARIZATION_UNKNOWN;
   return CFPDFDataAvailFromFPDFAvail(avail)->m_pDataAvail->IsLinearizedPDF();
 }