Make CPDF_Function::Load() return an unique_ptr.

core/fpdfapi/fpdf_page/pageint.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 CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_
 #define CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_
 
 #include <map>
@@ skipping 364 matching lines @@
 class CPDF_Function {
  public:
   enum class Type {
     kTypeInvalid = -1,
     kType0Sampled = 0,
     kType2ExpotentialInterpolation = 2,
     kType3Stitching = 3,
     kType4PostScript = 4,
   };
 
-  static CPDF_Function* Load(CPDF_Object* pFuncObj);
+  static std::unique_ptr<CPDF_Function> Load(CPDF_Object* pFuncObj);
   static Type IntegerToFunctionType(int iType);
 
   virtual ~CPDF_Function();
   FX_BOOL Call(FX_FLOAT* inputs,
                uint32_t ninputs,
                FX_FLOAT* results,
                int& nresults) const;
   uint32_t CountInputs() const { return m_nInputs; }
   uint32_t CountOutputs() const { return m_nOutputs; }
   FX_FLOAT GetDomain(int i) const { return m_pDomains[i]; }
@@ skipping 157 matching lines @@
 };
 
 CFX_ByteStringC PDF_FindKeyAbbreviationForTesting(const CFX_ByteStringC& abbr);
 CFX_ByteStringC PDF_FindValueAbbreviationForTesting(
     const CFX_ByteStringC& abbr);
 
 void PDF_ReplaceAbbr(CPDF_Object* pObj);
 bool IsPathOperator(const uint8_t* buf, size_t len);
 
 #endif  // CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_