Fix performance regression introduced in r28961

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 7148eab8ba8889fafe8273417a82489b400fc8b5..983da4787fe5a3064b3369e7e8f550544c8beeea 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -598,7 +598,7 @@ void Genesis::SetStrictFunctionInstanceDescriptor(Handle<Map> map,
   // Add length.
   if (function_mode == BOUND_FUNCTION) {
     Handle<String> length_string = isolate()->factory()->length_string();
-    DataDescriptor d(length_string, 0, ro_attribs, Representation::Tagged());
+    DataDescriptor d(length_string, 0, roc_attribs, Representation::Tagged());
     map->AppendDescriptor(&d);
   } else {
     DCHECK(function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE ||