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

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 4524a139dd97429d7c62bde5b6e93435172ccb13..43c18e83962eaf18165d6678331e6d1afaf81e19 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1843,6 +1843,9 @@ class JSObject: public JSReceiver {
   static void MigrateInstance(Handle<JSObject> instance);
   inline MUST_USE_RESULT MaybeObject* MigrateInstance();
 
+  static Handle<Object> TryMigrateInstance(Handle<JSObject> instance);
+  inline MUST_USE_RESULT MaybeObject* TryMigrateInstance();
+
   // Can cause GC.
   MUST_USE_RESULT MaybeObject* SetLocalPropertyIgnoreAttributes(
       Name* key,