Add js-perf-test for ES6 class default constructor

test/js-perf-test/Classes/default-constructor.js

Index: test/js-perf-test/Classes/default-constructor.js
diff --git a/test/js-perf-test/Classes/default-constructor.js b/test/js-perf-test/Classes/default-constructor.js
new file mode 100644
index 0000000000000000000000000000000000000000..49dcaa6be79ffea129a3c15bdbd02e27180d9789
--- /dev/null
+++ b/test/js-perf-test/Classes/default-constructor.js
@@ -0,0 +1,33 @@
+// Copyright 2014 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.
+'use strict';
+
+var DefaultConstructorBenchmark = new BenchmarkSuite('DefaultConstructor',
+    [100], [
+      new Benchmark('NoSuperClass', false, false, 0, NoSuperClass),
+      new Benchmark('WithSuperClass', false, false, 0, WithSuperClass),
+      new Benchmark('WithSuperClassArguments', false, false, 0,
+                    WithSuperClassArguments),
+    ]);
+
+
+class BaseClass {}
+
+
+class DerivedClass extends BaseClass {}
+
+
+function NoSuperClass() {
+  return new BaseClass();
+}
+
+
+function WithSuperClass() {
+  return new DerivedClass();
+}
+
+
+function WithSuperClassArguments() {
+  return new DerivedClass(0, 1, 2, 3, 4);
+}