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

fpdfsdk/fpdfxfa/fpdfxfa_page.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 "fpdfsdk/fpdfxfa/fpdfxfa_page.h"
 
 #include "core/fpdfapi/fpdf_page/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_document.h"
 #include "fpdfsdk/fpdfxfa/fpdfxfa_doc.h"
 #include "fpdfsdk/fpdfxfa/fpdfxfa_util.h"
 #include "fpdfsdk/fsdk_define.h"
 #include "public/fpdf_formfill.h"
+#include "third_party/base/ptr_util.h"
 #include "xfa/fxfa/xfa_ffdocview.h"
 #include "xfa/fxfa/xfa_ffpageview.h"
 
 CPDFXFA_Page::CPDFXFA_Page(CPDFXFA_Document* pDoc, int page_index)
     : m_pXFAPageView(nullptr),
       m_pDocument(pDoc),
       m_iPageIndex(page_index),
       m_iRef(1) {}
 
 CPDFXFA_Page::~CPDFXFA_Page() {
   if (m_pDocument)
     m_pDocument->RemovePage(this);
 }
 
 FX_BOOL CPDFXFA_Page::LoadPDFPage() {
   if (!m_pDocument)
     return FALSE;
 
   CPDF_Document* pPDFDoc = m_pDocument->GetPDFDoc();
   if (!pPDFDoc)
     return FALSE;
 
   CPDF_Dictionary* pDict = pPDFDoc->GetPage(m_iPageIndex);
   if (!pDict)
     return FALSE;
 
   if (!m_pPDFPage || m_pPDFPage->m_pFormDict != pDict) {
-    m_pPDFPage = WrapUnique(new CPDF_Page(pPDFDoc, pDict, true));
+    m_pPDFPage = pdfium::MakeUnique<CPDF_Page>(pPDFDoc, pDict, true);
     m_pPDFPage->ParseContent();
   }
   return TRUE;
 }
 
 FX_BOOL CPDFXFA_Page::LoadXFAPageView() {
   if (!m_pDocument)
     return FALSE;
 
   CXFA_FFDoc* pXFADoc = m_pDocument->GetXFADoc();
@@ skipping 28 matching lines @@
     default:
       return FALSE;
   }
 }
 
 FX_BOOL CPDFXFA_Page::LoadPDFPage(CPDF_Dictionary* pageDict) {
   if (!m_pDocument || m_iPageIndex < 0 || !pageDict)
     return FALSE;
 
   m_pPDFPage =
-      WrapUnique(new CPDF_Page(m_pDocument->GetPDFDoc(), pageDict, true));
+      pdfium::MakeUnique<CPDF_Page>(m_pDocument->GetPDFDoc(), pageDict, true);
   m_pPDFPage->ParseContent();
   return TRUE;
 }
 
 FX_FLOAT CPDFXFA_Page::GetPageWidth() const {
   if (!m_pPDFPage && !m_pXFAPageView)
     return 0.0f;
 
   int nDocType = m_pDocument->GetDocType();
   switch (nDocType) {
@@ skipping 112 matching lines @@
     case DOCTYPE_PDF:
     case DOCTYPE_STATIC_XFA: {
       if (m_pPDFPage) {
         m_pPDFPage->GetDisplayMatrix(matrix, xPos, yPos, xSize, ySize, iRotate);
       }
     } break;
     default:
       return;
   }
 }