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

fpdfsdk/formfiller/cffl_listbox.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/formfiller/cffl_listbox.h"
 
 #include "fpdfsdk/cpdfsdk_environment.h"
 #include "fpdfsdk/cpdfsdk_widget.h"
 #include "fpdfsdk/formfiller/cba_fontmap.h"
 #include "fpdfsdk/formfiller/cffl_formfiller.h"
 #include "fpdfsdk/formfiller/cffl_interactiveformfiller.h"
 #include "fpdfsdk/fsdk_common.h"
 #include "fpdfsdk/pdfwindow/PWL_ListBox.h"
+#include "third_party/base/ptr_util.h"
 
 #define FFL_DEFAULTLISTBOXFONTSIZE 12.0f
 
 CFFL_ListBox::CFFL_ListBox(CPDFSDK_Environment* pApp, CPDFSDK_Annot* pWidget)
     : CFFL_FormFiller(pApp, pWidget) {}
 
 CFFL_ListBox::~CFFL_ListBox() {}
 
 PWL_CREATEPARAM CFFL_ListBox::GetCreateParam() {
   PWL_CREATEPARAM cp = CFFL_FormFiller::GetCreateParam();
 
   uint32_t dwFieldFlag = m_pWidget->GetFieldFlags();
 
   if (dwFieldFlag & FIELDFLAG_MULTISELECT) {
     cp.dwFlags |= PLBS_MULTIPLESEL;
   }
 
   cp.dwFlags |= PWS_VSCROLL;
 
   if (cp.dwFlags & PWS_AUTOFONTSIZE)
     cp.fFontSize = FFL_DEFAULTLISTBOXFONTSIZE;
 
   if (!m_pFontMap) {
     m_pFontMap =
-        WrapUnique(new CBA_FontMap(m_pWidget, m_pEnv->GetSysHandler()));
+        pdfium::MakeUnique<CBA_FontMap>(m_pWidget, m_pEnv->GetSysHandler());
   }
   cp.pFontMap = m_pFontMap.get();
 
   return cp;
 }
 
 CPWL_Wnd* CFFL_ListBox::NewPDFWindow(const PWL_CREATEPARAM& cp,
                                      CPDFSDK_PageView* pPageView) {
   CPWL_ListBox* pWnd = new CPWL_ListBox();
   pWnd->AttachFFLData(this);
@@ skipping 147 matching lines @@
     RestoreState(pPageView);
     pRet = GetPDFWindow(pPageView, FALSE);
   } else {
     pRet = GetPDFWindow(pPageView, TRUE);
   }
 
   m_pWidget->UpdateField();
 
   return pRet;
 }