Fix Undefined-shift in CPDF_SampledFunc::v_Init().

core/fpdfapi/fpdf_page/pageint.h

Index: core/fpdfapi/fpdf_page/pageint.h
diff --git a/core/fpdfapi/fpdf_page/pageint.h b/core/fpdfapi/fpdf_page/pageint.h
index 6534186dc8cb45d524546d0d394facf1c8e77953..577cf597a0ee6fe37a7cc6064491a5159e0b72e6 100644
--- a/core/fpdfapi/fpdf_page/pageint.h
+++ b/core/fpdfapi/fpdf_page/pageint.h
@@ -367,13 +367,16 @@ class CPDF_DocPageData {
 class CPDF_Function {
  public:
   enum class Type {
-    kType0Sampled,
-    kType2ExpotentialInterpolation,
-    kType3Stitching,
-    kType4PostScript,
+    kTypeInvalid = -1,
+    kType0Sampled = 0,
+    kType2ExpotentialInterpolation = 2,
+    kType3Stitching = 3,
+    kType4PostScript = 4,
   };
 
   static CPDF_Function* Load(CPDF_Object* pFuncObj);
+  static Type IntegerToFunctionType(int iType);
+
   virtual ~CPDF_Function();
   FX_BOOL Call(FX_FLOAT* inputs,
                uint32_t ninputs,
@@ -381,12 +384,10 @@ class CPDF_Function {
                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]; }
-  FX_FLOAT GetRange(int i) const { return m_pRanges[i]; }
-  Type GetType() const { return m_Type; }
 
  protected:
-  CPDF_Function(Type type);
+  CPDF_Function();
+
   FX_BOOL Init(CPDF_Object* pObj);
   virtual FX_BOOL v_Init(CPDF_Object* pObj) = 0;
   virtual FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const = 0;
@@ -395,7 +396,6 @@ class CPDF_Function {
   uint32_t m_nOutputs;
   FX_FLOAT* m_pDomains;
   FX_FLOAT* m_pRanges;
-  Type m_Type;
 };
 
 class CPDF_ExpIntFunc : public CPDF_Function {
@@ -433,11 +433,12 @@ class CPDF_SampledFunc : public CPDF_Function {
   FX_BOOL v_Init(CPDF_Object* pObj) override;
   FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override;
 
-  SampleEncodeInfo* m_pEncodeInfo;
-  SampleDecodeInfo* m_pDecodeInfo;
+ private:
+  std::vector<SampleEncodeInfo> m_pEncodeInfo;
+  std::vector<SampleDecodeInfo> m_pDecodeInfo;
   uint32_t m_nBitsPerSample;
   uint32_t m_SampleMax;
-  CPDF_StreamAcc* m_pSampleStream;
+  std::unique_ptr<CPDF_StreamAcc> m_pSampleStream;
 };
 
 class CPDF_StitchFunc : public CPDF_Function {
@@ -449,7 +450,7 @@ class CPDF_StitchFunc : public CPDF_Function {
   FX_BOOL v_Init(CPDF_Object* pObj) override;
   FX_BOOL v_Call(FX_FLOAT* inputs, FX_FLOAT* results) const override;
 
-  std::vector<CPDF_Function*> m_pSubFunctions;
+  std::vector<std::unique_ptr<CPDF_Function>> m_pSubFunctions;
   FX_FLOAT* m_pBounds;
   FX_FLOAT* m_pEncode;