[es6] Reintroduce the instanceof operator in the backends.

test/mjsunit/messages.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --stack-size=100 --harmony
 // Flags: --harmony-simd --harmony-instanceof
 
 function test(f, expected, type) {
   try {
     f();
@@ skipping 129 matching lines @@
   var iter = generator();
   iter.next();
 }, "Generator is already running", TypeError);
 
 // kIncompatibleMethodReceiver
 test(function() {
   Set.prototype.add.call([]);
 }, "Method Set.prototype.add called on incompatible receiver [object Array]",
 TypeError);
 
-// kInstanceofFunctionExpected
+// kNonCallableInInstanceOfCheck
+test(function() {
+  1 instanceof {};
+}, "Right-hand side of 'instanceof' is not callable", TypeError);
+
+// kNonObjectInInstanceOfCheck
 test(function() {
   1 instanceof 1;
 }, "Right-hand side of 'instanceof' is not an object", TypeError);
 
 // kInstanceofNonobjectProto
 test(function() {
   function f() {}
   var o = new f();
   f.prototype = 1;
   o instanceof f;
@@ skipping 284 matching lines @@
   Number(1).toString(100);
 }, "toString() radix argument must be between 2 and 36", RangeError);
 
 
 // === URIError ===
 
 // kURIMalformed
 test(function() {
   decodeURI("%%");
 }, "URI malformed", URIError);