[Test] Add perf tests for TypedArray constructors.

Adds a perf test for constructing a TypedArray from a regular array,
and from a pre-made ArrayBuffer. Runs both new tests with default and
future configurations for comparison.

BUG=v8:5977

Change-Id: Idd132ca879702c54b2947a0e57ed8fe782f2767f
Reviewed-on: https://chromium-review.googlesource.com/446342Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43412}

test/js-perf-test/JSTests.json

@@ -297,6 +297,30 @@
           "main": "run.js",
           "test_flags": ["constructor"]
         },
+        {
+          "name": "ConstructWithBuffer",
+          "main": "run.js",
+          "test_flags": ["construct-buffer"]
+        },
+        {
+          "name": "ConstructWithBuffer--Future",
+          "flags": ["--future"],
+          "results_regexp": "^TypedArrays\\-ConstructWithBuffer\\(Score\\): (.+)$",
+          "main": "run.js",
+          "test_flags": ["construct-buffer"]
+        },
+        {
+          "name": "ConstructArrayLike",
+          "main": "run.js",
+          "test_flags": ["construct-arraylike"]
+        },
+        {
+          "name": "ConstructArrayLike--Future",
+          "flags": ["--future"],
+          "results_regexp": "^TypedArrays\\-ConstructArrayLike\\(Score\\): (.+)$",
+          "main": "run.js",
+          "test_flags": ["construct-arraylike"]
+        },
         {
           "name": "Sort",
           "main": "run.js",

test/js-perf-test/TypedArrays/construct-arraylike.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.
+
+new BenchmarkSuite('ConstructArrayLike', [1000], [
+  new Benchmark('ConstructArrayLike', false, false, 0, constructor),
+]);
+
+var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+
+function constructor() {
+  new Int32Array(arr);
+}

test/js-perf-test/TypedArrays/construct-buffer.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.
+
+new BenchmarkSuite('ConstructWithBuffer', [1000], [
+  new Benchmark('ConstructWithBuffer', false, false, 0, constructor),
+]);
+
+var buffer = new ArrayBuffer(64);
+
+function constructor() {
+  new Int32Array(buffer);
+}