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

fpdfsdk/fpdfxfa/fpdfxfa_app.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_app.h"
 
 #include <memory>
 
 #include "fpdfsdk/cpdfsdk_environment.h"
 #include "fpdfsdk/fpdfxfa/fpdfxfa_util.h"
 #include "fpdfsdk/fsdk_define.h"
+#include "third_party/base/ptr_util.h"
 #include "xfa/fxbarcode/BC_Library.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 #include "xfa/fxfa/xfa_fontmgr.h"
 
 namespace {
 
 CPDFXFA_App* g_pApp = nullptr;
 
 }  // namespace
 
@@ skipping 25 matching lines @@
 }
 
 FX_BOOL CPDFXFA_App::Initialize(v8::Isolate* pIsolate) {
   BC_Library_Init();
   FXJSE_Initialize();
 
   m_pIsolate = pIsolate ? pIsolate : FXJSE_Runtime_Create_Own();
   if (!m_pIsolate)
     return FALSE;
 
-  m_pXFAApp = WrapUnique(new CXFA_FFApp(this));
+  m_pXFAApp = pdfium::MakeUnique<CXFA_FFApp>(this);
   m_pXFAApp->SetDefaultFontMgr(
       std::unique_ptr<CXFA_DefFontMgr>(new CXFA_DefFontMgr));
 
   return TRUE;
 }
 
 FX_BOOL CPDFXFA_App::AddFormFillEnv(CPDFSDK_Environment* pEnv) {
   if (!pEnv)
     return FALSE;
 
@@ skipping 261 matching lines @@
   }
 }
 
 IFWL_AdapterTimerMgr* CPDFXFA_App::GetTimerMgr() {
   CXFA_FWLAdapterTimerMgr* pAdapter = nullptr;
   CPDFSDK_Environment* pEnv = m_pEnvList.GetAt(0);
   if (pEnv)
     pAdapter = new CXFA_FWLAdapterTimerMgr(pEnv);
   return pAdapter;
 }