Use unique_ptr return from CPDF_Parser::ParseIndirectObject()

core/fpdfapi/parser/cpdf_document.h

Index: core/fpdfapi/parser/cpdf_document.h
diff --git a/core/fpdfapi/parser/cpdf_document.h b/core/fpdfapi/parser/cpdf_document.h
index cf1bcae6b5ab1cbc64320a5a16f81a8ae3b22036..fce84001b916f64bf1fdfc36954013fd20b3f57c 100644
--- a/core/fpdfapi/parser/cpdf_document.h
+++ b/core/fpdfapi/parser/cpdf_document.h
@@ -113,7 +113,7 @@ class CPDF_Document : public CPDF_IndirectObjectHolder {
                     uint32_t objnum,
                     int& index,
                     int level = 0);
-  CPDF_Object* ParseIndirectObject(uint32_t objnum) override;
+  std::unique_ptr<CPDF_Object> ParseIndirectObject(uint32_t objnum) override;
   void LoadDocInternal();
   size_t CalculateEncodingDict(int charset, CPDF_Dictionary* pBaseDict);
   CPDF_Dictionary* GetPagesDict() const;