Add benchmarks for comparing spread literal with copying schemes for arrays

Bug: v8:7973
Change-Id: I76308296dd45ef797d1eafd6e2736ccefb54302d
Reviewed-on: https://chromium-review.googlesource.com/1162222Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#54924}

test/js-perf-test/JSTests.json

@@ -59,6 +59,51 @@
       "resources": ["generators.js"],
       "results_regexp": "^Generators\\-Generators\\(Score\\): (.+)$"
     },
+    {
+      "name": "ArrayLiteralInitialSpread",
+      "path": ["ArrayLiteralInitialSpread"],
+      "main": "run.js",
+      "resources": [],
+      "results_regexp": "^%s\\-ArrayLiteralInitialSpread\\(Score\\): (.+)$",
+      "tests": [
+        {"name": "Spread-Small"},
+        {"name": "ForLength-Small"},
+        {"name": "ForLengthEmpty-Small"},
+        {"name": "Slice-Small"},
+        {"name": "Slice0-Small"},
+        {"name": "ConcatReceive-Small"},
+        {"name": "ConcatArg-Small"},
+        {"name": "ForOfPush-Small"},
+        {"name": "MapId-Small"},
+        {"name": "Spread-Large"},
+        {"name": "ForLength-Large"},
+        {"name": "ForLengthEmpty-Large"},
+        {"name": "Slice-Large"},
+        {"name": "Slice0-Large"},
+        {"name": "ConcatReceive-Large"},
+        {"name": "ConcatArg-Large"},
+        {"name": "ForOfPush-Large"},
+        {"name": "MapId-Large"},
+        {"name": "Spread-SmallHoley"},
+        {"name": "ForLength-SmallHoley"},
+        {"name": "ForLengthEmpty-SmallHoley"},
+        {"name": "Slice-SmallHoley"},
+        {"name": "Slice0-SmallHoley"},
+        {"name": "ConcatReceive-SmallHoley"},
+        {"name": "ConcatArg-SmallHoley"},
+        {"name": "ForOfPush-SmallHoley"},
+        {"name": "MapId-SmallHoley"},
+        {"name": "Spread-LargeHoley"},
+        {"name": "ForLength-LargeHoley"},
+        {"name": "ForLengthEmpty-LargeHoley"},
+        {"name": "Slice-LargeHoley"},
+        {"name": "Slice0-LargeHoley"},
+        {"name": "ConcatReceive-LargeHoley"},
+        {"name": "ConcatArg-LargeHoley"},
+        {"name": "ForOfPush-LargeHoley"},
+        {"name": "MapId-LargeHoley"}
+      ]
+    },
     {
       "name": "ArrayLiteralSpread",
       "path": ["ArrayLiteralSpread"],