[strong] Implement per-object restrictions behaviour of delete operator

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 4b7341ece9f02d2e7f1aa0886c2a67cfc47f1f1c..e38ce5a55e6a620dad68a598cc75fbeb2bf4c8f9 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3618,7 +3618,8 @@ class Dictionary: public HashTable<Derived, Shape, Key> {
   }
 
   // Delete a property from the dictionary.
-  static Handle<Object> DeleteProperty(Handle<Derived> dictionary, int entry);
+  static Handle<Object> DeleteProperty(Handle<Derived> dictionary, int entry,
+                                       bool strong_obj = false);
 
   // Attempt to shrink the dictionary after deletion of key.
   MUST_USE_RESULT static inline Handle<Derived> Shrink(