Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/parser/cpdf_array.h

Index: core/fpdfapi/parser/cpdf_array.h
diff --git a/core/fpdfapi/parser/cpdf_array.h b/core/fpdfapi/parser/cpdf_array.h
index f473e268005d4b0bb76e3d58e55e0f930d894d45..18f1c00753785473183a2603ff1c2d15613ca043 100644
--- a/core/fpdfapi/parser/cpdf_array.h
+++ b/core/fpdfapi/parser/cpdf_array.h
@@ -54,6 +54,7 @@ class CPDF_Array : public CPDF_Object {
   void AddString(const CFX_ByteString& str);
   void AddName(const CFX_ByteString& str);
   void AddReference(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum);
+  void AddReference(CPDF_IndirectObjectHolder* pDoc, const CPDF_Object* pObj);
 
   iterator begin() { return m_Objects.begin(); }
   iterator end() { return m_Objects.end(); }