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

fpdfsdk/cpdfsdk_environment.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_environment.h"
 
 #include <memory>
 
 #include "fpdfsdk/cpdfsdk_annothandlermgr.h"
 #include "fpdfsdk/cpdfsdk_document.h"
 #include "fpdfsdk/formfiller/cffl_interactiveformfiller.h"
 #include "fpdfsdk/fsdk_actionhandler.h"
 #include "fpdfsdk/javascript/ijs_runtime.h"
+#include "third_party/base/ptr_util.h"
 
 #ifdef PDF_ENABLE_XFA
 #include "fpdfsdk/fpdfxfa/fpdfxfa_app.h"
 #endif  // PDF_ENABLE_XFA
 
 namespace {
 
 // NOTE: |bsUTF16LE| must outlive the use of the result. Care must be taken
 // since modifying the result would impact |bsUTF16LE|.
 FPDF_WIDESTRING AsFPDFWideString(CFX_ByteString* bsUTF16LE) {
@@ skipping 168 matching lines @@
 IJS_Runtime* CPDFSDK_Environment::GetJSRuntime() {
   if (!IsJSInitiated())
     return nullptr;
   if (!m_pJSRuntime)
     m_pJSRuntime.reset(IJS_Runtime::Create(this));
   return m_pJSRuntime.get();
 }
 
 CPDFSDK_AnnotHandlerMgr* CPDFSDK_Environment::GetAnnotHandlerMgr() {
   if (!m_pAnnotHandlerMgr)
-    m_pAnnotHandlerMgr = WrapUnique(new CPDFSDK_AnnotHandlerMgr(this));
+    m_pAnnotHandlerMgr = pdfium::MakeUnique<CPDFSDK_AnnotHandlerMgr>(this);
   return m_pAnnotHandlerMgr.get();
 }
 
 CPDFSDK_ActionHandler* CPDFSDK_Environment::GetActionHander() {
   if (!m_pActionHandler)
-    m_pActionHandler = WrapUnique(new CPDFSDK_ActionHandler());
+    m_pActionHandler = pdfium::MakeUnique<CPDFSDK_ActionHandler>();
   return m_pActionHandler.get();
 }
 
 CFFL_InteractiveFormFiller* CPDFSDK_Environment::GetInteractiveFormFiller() {
   if (!m_pFormFiller)
-    m_pFormFiller = WrapUnique(new CFFL_InteractiveFormFiller(this));
+    m_pFormFiller = pdfium::MakeUnique<CFFL_InteractiveFormFiller>(this);
   return m_pFormFiller.get();
 }
 
 void CPDFSDK_Environment::Invalidate(FPDF_PAGE page,
                                      double left,
                                      double top,
                                      double right,
                                      double bottom) {
   if (m_pInfo && m_pInfo->FFI_Invalidate)
     m_pInfo->FFI_Invalidate(m_pInfo, page, left, top, right, bottom);
@@ skipping 308 matching lines @@
   delete[] pbuff;
   return wsRet;
 }
 
 void CPDFSDK_Environment::PageEvent(int iPageCount,
                                     uint32_t dwEventType) const {
   if (m_pInfo && m_pInfo->FFI_PageEvent)
     m_pInfo->FFI_PageEvent(m_pInfo, iPageCount, dwEventType);
 }
 #endif  // PDF_ENABLE_XFA