[es6] Function constructor-created functions should be named "anonymous"

src/accessors.cc

Index: src/accessors.cc
diff --git a/src/accessors.cc b/src/accessors.cc
index b89917f73ecd7cc63b9e00e59c3789e2e95e5e52..653fdc6a8c71741f0fe2cffa514b817b117be3e8 100644
--- a/src/accessors.cc
+++ b/src/accessors.cc
@@ -1074,7 +1074,12 @@ void Accessors::FunctionNameGetter(
   HandleScope scope(isolate);
   Handle<JSFunction> function =
       Handle<JSFunction>::cast(Utils::OpenHandle(*info.Holder()));
-  Handle<Object> result(function->shared()->name(), isolate);
+  Handle<Object> result;
+  if (function->shared()->name_should_print_as_anonymous()) {
+    result = isolate->factory()->anonymous_string();
+  } else {
+    result = handle(function->shared()->name(), isolate);
+  }
   info.GetReturnValue().Set(Utils::ToLocal(result));
 }