Use smart pointers for class owned member variables

core/fpdfdoc/cpvt_sectioninfo.h

 // 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
 
 #ifndef CORE_FPDFDOC_CPVT_SECTIONINFO_H_
 #define CORE_FPDFDOC_CPVT_SECTIONINFO_H_
 
+#include <memory>
+
 #include "core/fpdfdoc/cpvt_floatrect.h"
 #include "core/fpdfdoc/include/cpvt_secprops.h"
 #include "core/fpdfdoc/include/cpvt_wordprops.h"
 
 struct CPVT_SectionInfo {
-  CPVT_SectionInfo()
-      : rcSection(), nTotalLine(0), pSecProps(nullptr), pWordProps(nullptr) {}
+  CPVT_SectionInfo();
+  CPVT_SectionInfo(const CPVT_SectionInfo& other);
+  ~CPVT_SectionInfo();
 
-  ~CPVT_SectionInfo() {
-    delete pSecProps;
-    delete pWordProps;
-  }
-
-  CPVT_SectionInfo(const CPVT_SectionInfo& other)
-      : rcSection(), nTotalLine(0), pSecProps(nullptr), pWordProps(nullptr) {
-    operator=(other);
-  }
-
-  void operator=(const CPVT_SectionInfo& other) {
-    if (this == &other)
-      return;
-
-    rcSection = other.rcSection;
-    nTotalLine = other.nTotalLine;
-    if (other.pSecProps) {
-      if (pSecProps)
-        *pSecProps = *other.pSecProps;
-      else
-        pSecProps = new CPVT_SecProps(*other.pSecProps);
-    }
-    if (other.pWordProps) {
-      if (pWordProps)
-        *pWordProps = *other.pWordProps;
-      else
-        pWordProps = new CPVT_WordProps(*other.pWordProps);
-    }
-  }
+  void operator=(const CPVT_SectionInfo& other);
 
   CPVT_FloatRect rcSection;
   int32_t nTotalLine;
-  CPVT_SecProps* pSecProps;
-  CPVT_WordProps* pWordProps;
+  std::unique_ptr<CPVT_SecProps> pSecProps;
+  std::unique_ptr<CPVT_WordProps> pWordProps;
 };
 
 #endif  // CORE_FPDFDOC_CPVT_SECTIONINFO_H_