[js-perf-tests] Add super benchmarks from SixSpeed.

test/js-perf-test/SixSpeed/super/babel.js

+// Copyright 2017 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.
+
+// This benchmark is based on the six-speed benchmark build output.
+// Copyright 2014 Kevin Decker <https://github.com/kpdecker/six-speed/>
+
+'use strict';
+
+new BenchmarkSuite('Babel', [1000], [
+  new Benchmark('Babel', false, false, 0, Babel),
+]);
+
+var _get = function get(object, property, receiver) {
+  if (object === null) object = Function.prototype;
+  var desc = Object.getOwnPropertyDescriptor(object, property);
+  if (desc === undefined) {
+    var parent = Object.getPrototypeOf(object);
+    if (parent === null) {
+      return undefined;
+    } else {
+      return get(parent, property, receiver);
+    }
+  } else if ('value' in desc) {
+    return desc.value;
+  } else {
+    var getter = desc.get;
+    if (getter === undefined) {
+      return undefined;
+    }
+    return getter.call(receiver);
+  }
+};
+
+var _createClass = function() {
+  function defineProperties(target, props) {
+    for (var i = 0; i < props.length; i++) {
+      var descriptor = props[i];
+      descriptor.enumerable = descriptor.enumerable || false;
+      descriptor.configurable = true;
+      if ('value' in descriptor) descriptor.writable = true;
+      Object.defineProperty(target, descriptor.key, descriptor);
+    }
+  }
+  return function(Constructor, protoProps, staticProps) {
+    if (protoProps) defineProperties(Constructor.prototype, protoProps);
+    if (staticProps) defineProperties(Constructor, staticProps);
+    return Constructor;
+  };
+}();
+
+function _possibleConstructorReturn(self, call) {
+  if (!self) {
+    throw new ReferenceError(
+        'this hasn\'t been initialised - super() hasn\'t been called');
+  }
+  return call && (typeof call === 'object' || typeof call === 'function') ?
+      call :
+      self;
+}
+
+function _inherits(subClass, superClass) {
+  if (typeof superClass !== 'function' && superClass !== null) {
+    throw new TypeError(
+        'Super expression must either be null or a function, not ' +
+        typeof superClass);
+  }
+  subClass.prototype = Object.create(superClass && superClass.prototype, {
+    constructor: {
+      value: subClass,
+      enumerable: false,
+      writable: true,
+      configurable: true
+    }
+  });
+  if (superClass)
+    Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) :
+                            subClass.__proto__ = superClass;
+}
+
+function _classCallCheck(instance, Constructor) {
+  if (!(instance instanceof Constructor)) {
+    throw new TypeError('Cannot call a class as a function');
+  }
+}
+
+var C = function() {
+  function C() {
+    _classCallCheck(this, C);
+
+    this.foo = 'bar';
+  }
+
+  _createClass(C, [{
+                 key: 'bar',
+                 value: function bar() {
+                   return 41;
+                 }
+               }]);
+
+  return C;
+}();
+
+var D = function(_C) {
+  _inherits(D, _C);
+
+  function D() {
+    _classCallCheck(this, D);
+
+    var _this = _possibleConstructorReturn(
+        this, (D.__proto__ || Object.getPrototypeOf(D)).call(this));
+
+    _this.baz = 'bat';
+    return _this;
+  }
+
+  _createClass(D, [{
+                 key: 'bar',
+                 value: function bar() {
+                   return _get(
+                              D.prototype.__proto__ ||
+                                  Object.getPrototypeOf(D.prototype),
+                              'bar', this)
+                              .call(this) +
+                       1;
+                 }
+               }]);
+
+  return D;
+}(C);
+
+function Babel() {
+  var d = new D();
+  return d.bar();
+}