Add benchmark for regexp "gi".

Measure speed regression of a range of char in complex regexp
The measurement is using the code from chromium:977003

To measure
python -u tools/run_perf.py --binary-override-path  out/x64.release/d8 \
  test/js-perf-test/RegExp.json

Run on three setting:
a. m74 based on tag 7.4.301
b. trunk (m77)
c. apply cl 1674851 on trunk

ComplexCaseInsensitiveTest-RegExp
Score is better if higher
		Score	imp %	comp to m74
m74		22910
		23430
		23360
Trunk (m77)	15190	66.30%
		15710	67.05%
		15570	66.65%
CL 1674851	24590	161.88%	107.33%
		24690	157.16%	105.38%
		24200	155.43%	103.60%

Bug: chromium:977003

Change-Id: I7756f4739c44a07949103650565d1ca902e1b7ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1679651
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62449}

test/js-perf-test/RegExp.json

@@ -24,6 +24,7 @@
         "base_test.js",
         "base.js",
         "case_test.js",
+        "complex_case_test.js",
         "ctor.js",
         "exec.js",
         "flags.js",
@@ -44,6 +45,7 @@
       "results_regexp": "^%s\\-RegExp\\(Score\\): (.+)$",
       "tests": [
         {"name": "CaseInsensitiveTest"},
+        {"name": "ComplexCaseInsensitiveTest"},
         {"name": "Ctor"},
         {"name": "Exec"},
         {"name": "Flags"},

test/js-perf-test/RegExp/RegExpTests.json

@@ -14,6 +14,7 @@
       "main": "run.js",
       "resources": [
         "case_test.js",
+        "complex_case_test.js",
         "base_ctor.js",
         "base_exec.js",
         "base_flags.js",
@@ -43,6 +44,7 @@
       "results_regexp": "^%s\\-RegExp\\(Score\\): (.+)$",
       "tests": [
         {"name": "CaseInsensitiveTest"},
+        {"name": "ComplexCaseInsensitiveTest"},
         {"name": "Ctor"},
         {"name": "Exec"},
         {"name": "Flags"},

test/js-perf-test/RegExp/complex_case_test.js

@@ -0,0 +1,46 @@
+// Copyright 2019 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.
+
+// The following RegExp regression case from
+// https://bugs.chromium.org/p/chromium/issues/detail?id=977003
+let g = "[\\t\\n\\f ]";
+let W = g + "*";
+let h = "[\\ud800-\\udbff][\\udc00-\\udfff]";
+let k = "[\\u0080-\\ud7ff\\ue000-\\ufffd]|" + h;
+let U = "[0-9a-fA-F]{1,6}" + g + "?";
+let E = "(?:" + U + "|[\\u0020-\\u007e\\u0080-\\ud7ff\\ue000\\ufffd]|" + h + ")";
+let m = "\\\\" + E;
+let o = "(?:[\\t\\x21\\x23-\\x26\\x28-\\x5b\\x5d-\\x7e]|" + k + "|" + m + ")";
+let p = '[^\'"\\n\\f\\\\]|\\\\[\\s\\S]';
+let q = '"(?:\'|' + p + ')*"' + '|\'(?:\"|' + p + ')*\'';
+let r = "[-+]?(?:[0-9]+(?:[.][0-9]+)?|[.][0-9]+)";
+let t = "(?:[a-zA-Z_]|" + k + "|" + m + ")";
+let u = "(?:[a-zA-Z0-9_-]|" + k + "|" + m + ")";
+let v = u + "+";
+let I = "-?" + t + u + "*";
+let x = "(?:@?-?" + t + "|#)" + u + "*";
+let y = r + "(?:%|" + I + ")?";
+let z = "url[(]" + W + "(?:" + q + "|" + o + "*)" + W + "[)]";
+let B = "U[+][0-9A-F?]{1,6}(?:-[0-9A-F]{1,6})?";
+let C = "<\!--";
+let F = "-->";
+let S = g + "+";
+let G = "/(?:[*][^*]*[*]+(?:[^/][^*]*[*]+)*/|/[^\\n\\f]*)";
+let J = "(?!url[(])" + I + "[(]";
+let R = "[~|^$*]=";
+let T = '[^"\'\\\\/]|/(?![/*])';
+let V = "\\uFEFF";
+let Y = [V, B, z, J, x, q, y, C, F, S, G, R, T].join("|");
+
+function ComplexGlobalCaseInsensitiveMatch() {
+  // keep the RegExp in the measurement but not string concat nor join.
+  let X = new RegExp(Y, "gi");
+  "abcſABCβκς".match(X);
+  "color:".match(X);
+}
+
+benchmarks = [ [ComplexGlobalCaseInsensitiveMatch, () => {}],
+             ];
+
+createBenchmarkSuite("ComplexCaseInsensitiveTest");

test/js-perf-test/RegExp/run.js

@@ -9,6 +9,7 @@ load('ctor.js');
 load('exec.js');
 load('flags.js');
 load('inline_test.js')
+load('complex_case_test.js');
 load('case_test.js');
 load('match.js');
 load('replace.js');