[test] Add object literal micro-benchmarks.

Add computed property names in object literal micro-benchmarks.

Taken from http://kpdecker.github.io/six-speed/

BUG=v8:5622

Review-Url: https://codereview.chromium.org/2509593004
Cr-Commit-Position: refs/heads/master@{#41057}

test/js-perf-test/SixSpeed.json

@@ -8,6 +8,20 @@
   "total": true,
   "resources": ["base.js"],
   "tests": [
+    {
+      "name": "Computed property names in object literals",
+      "path": ["SixSpeed/object_literals"],
+      "main": "run.js",
+      "resources": [
+        "run.js",
+        "object_literals.js"
+      ],
+      "results_regexp": "^%s\\(Score\\): (.+)$",
+      "tests": [
+        {"name": "ObjectLiterals-ES5"},
+        {"name": "ObjectLiterals-ES6"}
+      ]
+    },
     {
       "name": "Spread",
       "path": ["SixSpeed/spread"],

test/js-perf-test/SixSpeed/object_literals/object_literals.js

+// Copyright 2016 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/>
+
+
+new BenchmarkSuite('ObjectLiterals-ES5', [1000], [
+  new Benchmark('ES5', false, false, 0, ES5),
+]);
+
+new BenchmarkSuite('ObjectLiterals-ES6', [1000], [
+  new Benchmark('ES6', false, false, 0, ES6),
+]);
+
+// ----------------------------------------------------------------------------
+// Benchmark: ES5
+// ----------------------------------------------------------------------------
+
+function ES5() {
+  "use strict";
+  var name = 'foo';
+  var ret = {};
+  ret[name] = 'bar';
+  return ret;
+}
+
+
+// ----------------------------------------------------------------------------
+// Benchmark: ES6
+// ----------------------------------------------------------------------------
+
+function ES6() {
+  "use strict";
+  var name = 'foo';
+  var ret = {
+    [name]: 'bar',
+  };
+  return ret;
+}

test/js-perf-test/SixSpeed/object_literals/run.js

+// Copyright 2016 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.
+
+load('../../base.js');
+load('object_literals.js');
+
+var success = true;
+
+function PrintResult(name, result) {
+  print(name + '(Score): ' + result);
+}
+
+
+function PrintError(name, error) {
+  PrintResult(name, error);
+  success = false;
+}
+
+
+BenchmarkSuite.config.doWarmup = undefined;
+BenchmarkSuite.config.doDeterministic = undefined;
+
+BenchmarkSuite.RunSuites({ NotifyResult: PrintResult,
+                           NotifyError: PrintError });