Make CPDF_Object containers hold objects via unique pointers

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 8cfa0333bb4acbbb42dde2cfa8f4d2cd72dc32e2..f473e268005d4b0bb76e3d58e55e0f930d894d45 100644
--- a/core/fpdfapi/parser/cpdf_array.h
+++ b/core/fpdfapi/parser/cpdf_array.h
@@ -17,8 +17,8 @@
 
 class CPDF_Array : public CPDF_Object {
  public:
-  using iterator = std::vector<CPDF_Object*>::iterator;
-  using const_iterator = std::vector<CPDF_Object*>::const_iterator;
+  using iterator = std::vector<UniqueObject>::iterator;
+  using const_iterator = std::vector<UniqueObject>::const_iterator;
 
   CPDF_Array();
 
@@ -67,8 +67,9 @@ class CPDF_Array : public CPDF_Object {
       bool bDirect,
       std::set<const CPDF_Object*>* pVisited) const override;
 
-  std::vector<CPDF_Object*> m_Objects;
+  std::vector<UniqueObject> m_Objects;
 };
+
 using UniqueArray = std::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Object>>;
 
 inline CPDF_Array* ToArray(CPDF_Object* obj) {