Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/edit/fpdf_edit_create.cpp

Index: core/fpdfapi/edit/fpdf_edit_create.cpp
diff --git a/core/fpdfapi/edit/fpdf_edit_create.cpp b/core/fpdfapi/edit/fpdf_edit_create.cpp
index fae2b14449c419e90ee787760607c13a28674c8a..5622b1dae7b33210ce0325bdb80994b4ca51a753 100644
--- a/core/fpdfapi/edit/fpdf_edit_create.cpp
+++ b/core/fpdfapi/edit/fpdf_edit_create.cpp
@@ -1244,12 +1244,10 @@ int32_t CPDF_Creator::WriteOldIndirectObject(uint32_t objnum) {
       m_ObjectOffset[objnum] = 0;
       return 0;
     }
-    if (WriteIndirectObj(pObj)) {
+    if (WriteIndirectObj(pObj))
       return -1;
-    }
-    if (!bExistInMap) {
-      m_pDocument->ReleaseIndirectObject(objnum);
-    }
+    if (!bExistInMap)
+      m_pDocument->DeleteIndirectObject(objnum);
   } else {
     uint8_t* pBuffer;
     uint32_t size;