Use smart pointers for class owned pointers

xfa/fgas/layout/fgas_textbreak.h

 // 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
 
 #ifndef XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_
 #define XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_
 
+#include <memory>
+
 #include "core/fxcrt/include/fx_ucd.h"
 #include "core/fxge/include/fx_ge.h"
 #include "xfa/fgas/crt/fgas_utils.h"
 #include "xfa/fgas/layout/fgas_unicode.h"
 
 class CFX_Char;
 class CFGAS_GEFont;
 class CFX_TxtChar;
 class CFX_TxtPiece;
 class IFX_TxtAccess;
@@ skipping 161 matching lines @@
     }
     wsStr.ReleaseBuffer(iCount);
   }
   void RemoveAll(FX_BOOL bLeaveMemory = FALSE) {
     m_pLineChars->RemoveAll();
     m_pLinePieces->RemoveAll(bLeaveMemory);
     m_iWidth = 0;
     m_iArabicChars = 0;
   }
 
-  CFX_TxtCharArray* m_pLineChars;
-  CFX_TxtPieceArray* m_pLinePieces;
+  std::unique_ptr<CFX_TxtCharArray> m_pLineChars;
+  std::unique_ptr<CFX_TxtPieceArray> m_pLinePieces;
   int32_t m_iStart;
   int32_t m_iWidth;
   int32_t m_iArabicChars;
 };
 
 class CFX_TxtBreak {
  public:
   CFX_TxtBreak(uint32_t dwPolicies);
   ~CFX_TxtBreak();
 
@@ skipping 87 matching lines @@
   int32_t m_iRotation;
   int32_t m_iAlignment;
   uint32_t m_dwContextCharStyles;
   int32_t m_iCombWidth;
   void* m_pUserData;
   FX_CHARTYPE m_eCharType;
   FX_BOOL m_bCurRTL;
   int32_t m_iCurAlignment;
   FX_BOOL m_bArabicNumber;
   FX_BOOL m_bArabicComma;
-  CFX_TxtLine* m_pTxtLine1;
-  CFX_TxtLine* m_pTxtLine2;
+  std::unique_ptr<CFX_TxtLine> m_pTxtLine1;
+  std::unique_ptr<CFX_TxtLine> m_pTxtLine2;
   CFX_TxtLine* m_pCurLine;
   int32_t m_iReady;
   int32_t m_iTolerance;
   int32_t m_iHorScale;
   int32_t m_iVerScale;
   int32_t m_iCharSpace;
 };
 
 #endif  // XFA_FGAS_LAYOUT_FGAS_TEXTBREAK_H_