[Test] Update 'default' SixSpeed benchmark to use different processes.

The results are unreliable as-is, because es5 and es6 run in the same d8
process consecutively. The graph also shows a huge amount of noise,
which seems to be mostly resolved with this change.

Review-Url: https://codereview.chromium.org/2675263002
Cr-Commit-Position: refs/heads/master@{#42961}

test/js-perf-test/SixSpeed.json

@@ -44,16 +44,19 @@
     },
     {
       "name": "Defaults",
-      "path": ["SixSpeed/defaults"],
-      "main": "run.js",
-      "resources": [
-        "run.js",
-        "defaults.js"
-      ],
+      "path": ["SixSpeed"],
       "results_regexp": "^%s\\(Score\\): (.+)$",
       "tests": [
-        {"name": "Defaults-ES5"},
-        {"name": "Defaults-ES6"}
+        {
+          "name": "ES5",
+          "main": "run.js",
+          "test_flags": ["defaults/es5"]
+        },
+        {
+          "name": "ES6",
+          "main": "run.js",
+          "test_flags": ["defaults/es6"]
+        }
       ]
     },
     {

test/js-perf-test/SixSpeed/defaults/defaults.js → test/js-perf-test/SixSpeed/defaults/es5.js

-// Copyright 2016 the V8 project authors. All rights reserved.
+// 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/>
 
-
-new BenchmarkSuite('Defaults-ES5', [1000], [
+new BenchmarkSuite('ES5', [1000], [
   new Benchmark('ES5', false, false, 0, ES5),
 ]);
 
-new BenchmarkSuite('Defaults-ES6', [1000], [
-  new Benchmark('ES6', false, false, 0, ES6),
-]);
-
-// ----------------------------------------------------------------------------
-// Benchmark: ES5
-// ----------------------------------------------------------------------------
-
 function ES5() {
   "use strict";
   function fn(arg, other) {
@@ -30,18 +21,3 @@ function ES5() {
   fn(2);
   fn(2, 4);
 }
-
-// ----------------------------------------------------------------------------
-// Benchmark: ES6
-// ----------------------------------------------------------------------------
-
-function ES6() {
-  "use strict";
-  function fn(arg = 1, other = 3) {
-    return other;
-  }
-
-  fn();
-  fn(2);
-  fn(2, 4);
-}

test/js-perf-test/SixSpeed/defaults/es6.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/>
+
+new BenchmarkSuite('ES6', [1000], [
+  new Benchmark('ES6', false, false, 0, ES6),
+]);
+
+function ES6() {
+  "use strict";
+  function fn(arg = 1, other = 3) {
+    return other;
+  }
+
+  fn();
+  fn(2);
+  fn(2, 4);
+}

test/js-perf-test/SixSpeed/defaults/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('defaults.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 });