[modules] Simplify installation of @@toStringTag on namespace objects.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 74f2b2926c08f93e87c22044913e1156517f110b..6cc9d77c541cfb3a242c7e16c42af3d9223f69e9 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2140,10 +2140,9 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     // Install @@toStringTag.
     PropertyAttributes attribs =
         static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY);
-    Handle<AccessorInfo> toStringTag =
-        Accessors::ModuleNamespaceToStringTagInfo(isolate, attribs);
-    AccessorConstantDescriptor d(factory->to_string_tag_symbol(), toStringTag,
-                                 attribs);
+    DataConstantDescriptor d(factory->to_string_tag_symbol(),
+                             factory->NewStringFromAsciiChecked("Module"),
+                             attribs);
     Map::EnsureDescriptorSlack(map, 1);
     map->AppendDescriptor(&d);