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

core/fpdfdoc/cpvt_sectioninfo.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 "core/fpdfdoc/cpvt_sectioninfo.h"
+#include "third_party/base/ptr_util.h"
 
 CPVT_SectionInfo::CPVT_SectionInfo() : rcSection(), nTotalLine(0) {}
 
 CPVT_SectionInfo::~CPVT_SectionInfo() {}
 
 CPVT_SectionInfo::CPVT_SectionInfo(const CPVT_SectionInfo& other) {
   operator=(other);
 }
 
 void CPVT_SectionInfo::operator=(const CPVT_SectionInfo& other) {
   if (this == &other)
     return;
 
   rcSection = other.rcSection;
   nTotalLine = other.nTotalLine;
   if (other.pSecProps)
-    pSecProps.reset(new CPVT_SecProps(*other.pSecProps));
+    pSecProps = pdfium::MakeUnique<CPVT_SecProps>(*other.pSecProps);
   else
     pSecProps.reset();
+
   if (other.pWordProps)
-    pWordProps.reset(new CPVT_WordProps(*other.pWordProps));
+    pWordProps = pdfium::MakeUnique<CPVT_WordProps>(*other.pWordProps);
   else
     pWordProps.reset();
 }