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

fpdfsdk/cpdfsdk_document.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 "fpdfsdk/cpdfsdk_document.h"
 
 #include "core/fpdfapi/fpdf_parser/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_object.h"
 #include "core/fpdfdoc/cpdf_action.h"
 #include "core/fpdfdoc/cpdf_docjsactions.h"
 #include "core/fpdfdoc/cpdf_occontext.h"
 #include "fpdfsdk/cpdfsdk_annot.h"
 #include "fpdfsdk/cpdfsdk_annothandlermgr.h"
 #include "fpdfsdk/cpdfsdk_environment.h"
 #include "fpdfsdk/cpdfsdk_interform.h"
 #include "fpdfsdk/cpdfsdk_pageview.h"
 #include "fpdfsdk/cpdfsdk_widget.h"
 #include "fpdfsdk/fsdk_actionhandler.h"
+#include "third_party/base/ptr_util.h"
 
 // static
 CPDFSDK_Document* CPDFSDK_Document::FromFPDFFormHandle(
     FPDF_FORMHANDLE hHandle) {
   CPDFSDK_Environment* pEnv = static_cast<CPDFSDK_Environment*>(hHandle);
   return pEnv ? pEnv->GetSDKDocument() : nullptr;
 }
 
 CPDFSDK_Document::CPDFSDK_Document(UnderlyingDocumentType* pDoc,
                                    CPDFSDK_Environment* pEnv)
@@ skipping 118 matching lines @@
 
   delete pPageView;
 }
 
 UnderlyingPageType* CPDFSDK_Document::GetPage(int nIndex) {
   return UnderlyingFromFPDFPage(m_pEnv->GetPage(m_pDoc, nIndex));
 }
 
 CPDFSDK_InterForm* CPDFSDK_Document::GetInterForm() {
   if (!m_pInterForm)
-    m_pInterForm = WrapUnique(new CPDFSDK_InterForm(this));
+    m_pInterForm = pdfium::MakeUnique<CPDFSDK_InterForm>(this);
   return m_pInterForm.get();
 }
 
 void CPDFSDK_Document::UpdateAllViews(CPDFSDK_PageView* pSender,
                                       CPDFSDK_Annot* pAnnot) {
   for (const auto& it : m_pageMap) {
     CPDFSDK_PageView* pPageView = it.second;
     if (pPageView != pSender) {
       pPageView->UpdateView(pAnnot);
     }
@@ skipping 81 matching lines @@
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }
 
 IJS_Runtime* CPDFSDK_Document::GetJsRuntime() {
   return m_pEnv->GetJSRuntime();
 }
 
 CFX_WideString CPDFSDK_Document::GetPath() {
   return m_pEnv->JS_docGetFilePath();
 }