[builtins] implement Array.prototype.includes in TurboFan

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a9c2439e61bbf077ad484031025d9fff7d03369e..6b71debd4bb7ab60c1af8fac21191475a885e89b 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2210,6 +2210,9 @@ class JSObject: public JSReceiver {
   static bool UnregisterPrototypeUser(Handle<Map> user, Isolate* isolate);
   static void InvalidatePrototypeChains(Map* map);
 
+  // Utility used by many Array builtins and runtime functions
+  static inline bool PrototypeHasNoElements(Isolate* isolate, JSObject* object);
+
   // Alternative implementation of WeakFixedArray::NullCallback.
   class PrototypeRegistryCompactionCallback {
    public: