All private symbols are own symbols

src/heap/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 3232 matching lines @@
 
   set_polymorphic_code_cache(PolymorphicCodeCache::cast(
       *factory->NewStruct(POLYMORPHIC_CODE_CACHE_TYPE)));
 
   set_instanceof_cache_function(Smi::FromInt(0));
   set_instanceof_cache_map(Smi::FromInt(0));
   set_instanceof_cache_answer(Smi::FromInt(0));
 
   {
     HandleScope scope(isolate());
-#define SYMBOL_INIT(name)                                                      \
-  {                                                                            \
-    Handle<String> name##d = factory->NewStringFromStaticChars(#name);         \
-    Handle<Object> symbol(isolate()->factory()->NewPrivateOwnSymbol(name##d)); \
-    roots_[k##name##RootIndex] = *symbol;                                      \
+#define SYMBOL_INIT(name)                                                   \
+  {                                                                         \
+    Handle<String> name##d = factory->NewStringFromStaticChars(#name);      \
+    Handle<Object> symbol(isolate()->factory()->NewPrivateSymbol(name##d)); \
+    roots_[k##name##RootIndex] = *symbol;                                   \
   }
     PRIVATE_SYMBOL_LIST(SYMBOL_INIT)
 #undef SYMBOL_INIT
   }
 
   {
     HandleScope scope(isolate());
 #define SYMBOL_INIT(name, varname, description)                             \
   Handle<Symbol> name = factory->NewSymbol();                               \
   Handle<String> name##d = factory->NewStringFromStaticChars(#description); \
@@ skipping 3493 matching lines @@
     *object_type = "CODE_TYPE";                                                \
     *object_sub_type = "CODE_AGE/" #name;                                      \
     return true;
     CODE_AGE_LIST_COMPLETE(COMPARE_AND_RETURN_NAME)
 #undef COMPARE_AND_RETURN_NAME
   }
   return false;
 }
 }  // namespace internal
 }  // namespace v8