Make CPDF_Function::Load() return an unique_ptr.

core/fpdfapi/fpdf_page/cpdf_shadingpattern.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_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_
 #define CORE_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_
 
+#include <memory>
+#include <vector>
+
 #include "core/fpdfapi/fpdf_page/cpdf_countedobject.h"
 #include "core/fpdfapi/fpdf_page/cpdf_pattern.h"
-#include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fxcrt/include/fx_system.h"
 
 enum ShadingType {
   kInvalidShading = 0,
   kFunctionBasedShading = 1,
   kAxialShading = 2,
   kRadialShading = 3,
   kFreeFormGouraudTriangleMeshShading = 4,
   kLatticeFormGouraudTriangleMeshShading = 5,
   kCoonsPatchMeshShading = 6,
   kTensorProductPatchMeshShading = 7,
   kMaxShading = 8
 };
 
 class CFX_Matrix;
 class CPDF_ColorSpace;
 class CPDF_Document;
+class CPDF_Function;
 class CPDF_Object;
 
 class CPDF_ShadingPattern : public CPDF_Pattern {
  public:
   CPDF_ShadingPattern(CPDF_Document* pDoc,
                       CPDF_Object* pPatternObj,
                       FX_BOOL bShading,
                       const CFX_Matrix& parentMatrix);
-
   ~CPDF_ShadingPattern() override;
 
   CPDF_TilingPattern* AsTilingPattern() override { return nullptr; }
   CPDF_ShadingPattern* AsShadingPattern() override { return this; }
 
   bool IsMeshShading() const {
     return m_ShadingType == kFreeFormGouraudTriangleMeshShading ||
            m_ShadingType == kLatticeFormGouraudTriangleMeshShading ||
            m_ShadingType == kCoonsPatchMeshShading ||
            m_ShadingType == kTensorProductPatchMeshShading;
   }
-  FX_BOOL Load();
+  bool Load();
 
+  ShadingType GetShadingType() const { return m_ShadingType; }
+  FX_BOOL IsShadingObject() const { return m_bShadingObj; }
+  CPDF_Object* GetShadingObject() const { return m_pShadingObj; }
+  CPDF_ColorSpace* GetCS() const { return m_pCS; }
+  const std::vector<std::unique_ptr<CPDF_Function>>& GetFuncs() {
+    return m_pFunctions;
+  }
+
+ private:
   ShadingType m_ShadingType;
   FX_BOOL m_bShadingObj;
   CPDF_Object* m_pShadingObj;
 
   // Still keep |m_pCS| as some CPDF_ColorSpace (name object) are not managed
   // as counted objects. Refer to CPDF_DocPageData::GetColorSpace.
   CPDF_ColorSpace* m_pCS;
 
   CPDF_CountedColorSpace* m_pCountedCS;
-  CPDF_Function* m_pFunctions[4];
-  size_t m_nFuncs;
+  std::vector<std::unique_ptr<CPDF_Function>> m_pFunctions;
 };
 
 #endif  // CORE_FPDFAPI_FPDF_PAGE_CPDF_SHADINGPATTERN_H_