Use smart pointers for class owned pointers in xfa/fxfa

xfa/fxfa/parser/cxfa_resolveprocessor.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_FXFA_PARSER_CXFA_RESOLVEPROCESSOR_H_
 #define XFA_FXFA_PARSER_CXFA_RESOLVEPROCESSOR_H_
 
+#include <memory>
+
 #include "xfa/fxfa/parser/xfa_object.h"
 #include "xfa/fxfa/parser/xfa_resolvenode_rs.h"
 
 class CXFA_NodeHelper;
 class CXFA_ScriptContext;
 
 class CXFA_ResolveNodesData {
  public:
   CXFA_ResolveNodesData(CXFA_ScriptContext* pSC = nullptr);
   ~CXFA_ResolveNodesData();
@@ skipping 19 matching lines @@
   int32_t GetFilter(const CFX_WideStringC& wsExpression,
                     int32_t nStart,
                     CXFA_ResolveNodesData& rnd);
   int32_t SetResultCreateNode(XFA_RESOLVENODE_RS& resolveNodeRS,
                               CFX_WideString& wsLastCondition);
   void SetIndexDataBind(CFX_WideString& wsNextCondition,
                         int32_t& iIndex,
                         int32_t iCount);
   void SetCurStart(int32_t start) { m_iCurStart = start; }
 
-  CXFA_NodeHelper* GetNodeHelper() { return m_pNodeHelper; }
+  CXFA_NodeHelper* GetNodeHelper() const { return m_pNodeHelper.get(); }
 
  private:
   int32_t ResolveForAttributeRs(CXFA_Object* curNode,
                                 CXFA_ResolveNodesData& rnd,
                                 const CFX_WideStringC& strAttr);
   int32_t ResolveAnyChild(CXFA_ResolveNodesData& rnd);
   int32_t ResolveDollar(CXFA_ResolveNodesData& rnd);
   int32_t ResolveExcalmatory(CXFA_ResolveNodesData& rnd);
   int32_t ResolveNumberSign(CXFA_ResolveNodesData& rnd);
   int32_t ResolveAsterisk(CXFA_ResolveNodesData& rnd);
   int32_t ResolveNormal(CXFA_ResolveNodesData& rnd);
   int32_t ResolvePopStack(CFX_Int32Array& stack);
   void SetStylesForChild(uint32_t dwParentStyles, CXFA_ResolveNodesData& rnd);
 
   void ConditionArray(int32_t iCurIndex,
                       CFX_WideString wsCondition,
                       int32_t iFoundCount,
                       CXFA_ResolveNodesData& rnd);
   void DoPredicateFilter(int32_t iCurIndex,
                          CFX_WideString wsCondition,
                          int32_t iFoundCount,
                          CXFA_ResolveNodesData& rnd);
   void FilterCondition(CXFA_ResolveNodesData& rnd, CFX_WideString wsCondition);
 
   int32_t m_iCurStart;
-  CXFA_NodeHelper* m_pNodeHelper;
+  std::unique_ptr<CXFA_NodeHelper> m_pNodeHelper;
 };
 
 #endif  // XFA_FXFA_PARSER_CXFA_RESOLVEPROCESSOR_H_