Update CPDF_IndirectObjectHolder APIs for unique objects

core/fpdfapi/parser/cpdf_array.cpp

Index: core/fpdfapi/parser/cpdf_array.cpp
diff --git a/core/fpdfapi/parser/cpdf_array.cpp b/core/fpdfapi/parser/cpdf_array.cpp
index 807f62d7f3ff5018ad959af1c56b67a1024a0f26..db3b18be3ea78e109e7430baee490f68293a2bdd 100644
--- a/core/fpdfapi/parser/cpdf_array.cpp
+++ b/core/fpdfapi/parser/cpdf_array.cpp
@@ -152,8 +152,9 @@ void CPDF_Array::ConvertToIndirectObjectAt(size_t i,
   if (!m_Objects[i] || m_Objects[i]->IsReference())
     return;
 
-  uint32_t dwObjNum = pHolder->AddIndirectObject(m_Objects[i].release());
-  m_Objects[i] = UniqueObject(new CPDF_Reference(pHolder, dwObjNum));
+  CPDF_Object* pUnowned = pHolder->AddIndirectObject(std::move(m_Objects[i]));
+  m_Objects[i] =
+      UniqueObject(new CPDF_Reference(pHolder, pUnowned->GetObjNum()));
 }
 
 void CPDF_Array::SetAt(size_t i, CPDF_Object* pObj) {
@@ -205,3 +206,8 @@ void CPDF_Array::AddReference(CPDF_IndirectObjectHolder* pDoc,
                               uint32_t objnum) {
   Add(new CPDF_Reference(pDoc, objnum));
 }
+
+void CPDF_Array::AddReference(CPDF_IndirectObjectHolder* pDoc,
+                              const CPDF_Object* pObj) {
+  AddReference(pDoc, pObj->GetObjNum());
+}