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 0a99e42c3f62713fd792db7c450bd911cc6864a1..a9fe56b741782909cf34642aca3c79e468bbb461 100644
--- a/core/fpdfapi/parser/cpdf_document.h
+++ b/core/fpdfapi/parser/cpdf_document.h
@@ -112,7 +112,7 @@ 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;