Reland "Use symbols instead of hidden properties for i18n markers."

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index bc200451be092805dfe910ac0001794910823c1c..2a86e1bef11dcd72c48c928e35be046e1d559f80 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2830,6 +2830,11 @@ void Heap::CreateInitialObjects() {
   set_instanceof_cache_map(Smi::FromInt(0));
   set_instanceof_cache_answer(Smi::FromInt(0));
 
+#define SYMBOL_INIT(name) \
+  roots_[k##name##RootIndex] = *factory->NewPrivateOwnSymbol();
+  PRIVATE_SYMBOL_LIST(SYMBOL_INIT)
+#undef SYMBOL_INIT
+
   CreateFixedStubs();
 
   // Allocate the dictionary of intrinsic function names.
@@ -2868,21 +2873,6 @@ void Heap::CreateInitialObjects() {
   // Number of queued microtasks stored in Isolate::pending_microtask_count().
   set_microtask_queue(empty_fixed_array());
 
-  set_detailed_stack_trace_symbol(*factory->NewPrivateOwnSymbol());
-  set_elements_transition_symbol(*factory->NewPrivateOwnSymbol());
-  set_frozen_symbol(*factory->NewPrivateOwnSymbol());
-  set_megamorphic_symbol(*factory->NewPrivateOwnSymbol());
-  set_premonomorphic_symbol(*factory->NewPrivateOwnSymbol());
-  set_generic_symbol(*factory->NewPrivateOwnSymbol());
-  set_nonexistent_symbol(*factory->NewPrivateOwnSymbol());
-  set_normal_ic_symbol(*factory->NewPrivateOwnSymbol());
-  set_observed_symbol(*factory->NewPrivateOwnSymbol());
-  set_stack_trace_symbol(*factory->NewPrivateOwnSymbol());
-  set_uninitialized_symbol(*factory->NewPrivateOwnSymbol());
-  set_home_object_symbol(*factory->NewPrivateOwnSymbol());
-  set_promise_debug_marker_symbol(*factory->NewPrivateOwnSymbol());
-  set_promise_has_handler_symbol(*factory->NewPrivateOwnSymbol());
-
   Handle<SeededNumberDictionary> slow_element_dictionary =
       SeededNumberDictionary::New(isolate(), 0, TENURED);
   slow_element_dictionary->set_requires_slow_elements();