Use smart pointers for class owned member variables

core/fpdfdoc/cpvt_wordinfo.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_WORDINFO_H_
 #define CORE_FPDFDOC_CPVT_WORDINFO_H_
 
+#include <memory>
+
 #include "core/fpdfdoc/include/cpvt_wordprops.h"
 #include "core/fxcrt/include/fx_system.h"
 
 struct CPVT_WordInfo {
-  CPVT_WordInfo()
-      : Word(0),
-        nCharset(FXFONT_ANSI_CHARSET),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(-1),
-        pWordProps(nullptr) {}
-
+  CPVT_WordInfo();
   CPVT_WordInfo(uint16_t word,
                 int32_t charset,
                 int32_t fontIndex,
-                CPVT_WordProps* pProps)
-      : Word(word),
-        nCharset(charset),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(fontIndex),
-        pWordProps(pProps) {}
+                CPVT_WordProps* pProps);
+  CPVT_WordInfo(const CPVT_WordInfo& word);
+  ~CPVT_WordInfo();
 
-  CPVT_WordInfo(const CPVT_WordInfo& word)
-      : Word(0),
-        nCharset(FXFONT_ANSI_CHARSET),
-        fWordX(0.0f),
-        fWordY(0.0f),
-        fWordTail(0.0f),
-        nFontIndex(-1),
-        pWordProps(nullptr) {
-    operator=(word);
-  }
-
-  ~CPVT_WordInfo() { delete pWordProps; }
-
-  void operator=(const CPVT_WordInfo& word) {
-    if (this == &word)
-      return;
-
-    Word = word.Word;
-    nCharset = word.nCharset;
-    nFontIndex = word.nFontIndex;
-    if (word.pWordProps) {
-      if (pWordProps)
-        *pWordProps = *word.pWordProps;
-      else
-        pWordProps = new CPVT_WordProps(*word.pWordProps);
-    }
-  }
+  void operator=(const CPVT_WordInfo& word);
 
   uint16_t Word;
   int32_t nCharset;
   FX_FLOAT fWordX;
   FX_FLOAT fWordY;
   FX_FLOAT fWordTail;
   int32_t nFontIndex;
-  CPVT_WordProps* pWordProps;
+  std::unique_ptr<CPVT_WordProps> pWordProps;
 };
 
 #endif  // CORE_FPDFDOC_CPVT_WORDINFO_H_