Avoid the ptr.reset(new XXX()) anti-pattern

xfa/fxbarcode/oned/BC_OnedUPCAWriter.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
 // Original code is licensed as follows:
 /*
  * Copyright 2010 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #include "core/fxge/cfx_fxgedevice.h"
 #include "core/fxge/cfx_gemodule.h"
+#include "third_party/base/ptr_util.h"
 #include "xfa/fxbarcode/BC_Writer.h"
 #include "xfa/fxbarcode/oned/BC_OneDimWriter.h"
 #include "xfa/fxbarcode/oned/BC_OnedEAN13Writer.h"
 #include "xfa/fxbarcode/oned/BC_OnedUPCAWriter.h"
 
 CBC_OnedUPCAWriter::CBC_OnedUPCAWriter() {
   m_bLeftPadding = true;
   m_bRightPadding = true;
 }
 
 void CBC_OnedUPCAWriter::Init() {
-  m_subWriter.reset(new CBC_OnedEAN13Writer);
+  m_subWriter = pdfium::MakeUnique<CBC_OnedEAN13Writer>();
 }
 
 CBC_OnedUPCAWriter::~CBC_OnedUPCAWriter() {}
 
 bool CBC_OnedUPCAWriter::CheckContentValidity(const CFX_WideStringC& contents) {
   for (FX_STRSIZE i = 0; i < contents.GetLength(); ++i) {
     if (contents.GetAt(i) < '0' || contents.GetAt(i) > '9')
       return false;
   }
   return true;
@@ skipping 224 matching lines @@
   FX_Free(pCharPos);
 }
 
 void CBC_OnedUPCAWriter::RenderResult(const CFX_WideStringC& contents,
                                       uint8_t* code,
                                       int32_t codeLength,
                                       bool isDevice,
                                       int32_t& e) {
   CBC_OneDimWriter::RenderResult(contents, code, codeLength, isDevice, e);
 }