Don't use fast literal if the boilerplate map is still deprecated.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 2562114276e12e383db0014af8b787461626ed56..40b8dfba19948041bd4866a27a779655ab0dea63 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -3644,6 +3644,19 @@ void JSObject::MigrateInstance(Handle<JSObject> object) {
 }
 
 
+Handle<Object> JSObject::TryMigrateInstance(Handle<JSObject> object) {
+  if (FLAG_trace_migration) {
+    PrintF("migrating instance (no new maps) %p (%p)\n",
+           static_cast<void*>(*object),
+           static_cast<void*>(object->map()));
+  }
+  CALL_HEAP_FUNCTION(
+      object->GetIsolate(),
+      object->MigrateInstance(),
+      Object);
+}
+
+
 Handle<Map> Map::GeneralizeRepresentation(Handle<Map> map,
                                           int modify_index,
                                           Representation representation) {