Revert of Remove SIMD.js from V8.

tools/try_perf.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 import argparse
 import os
 import subprocess
 import sys
 
@@ skipping 28 matching lines @@
   'kraken_orig',
   'kraken_orig-ignition',
   'massive',
   'memory',
   'octane',
   'octane-noopt',
   'octane-ignition',
   'octane-pr',
   'octane-tf',
   'octane-tf-pr',
+  'simdjs',
   'sunspider',
   'sunspider-ignition',
   'unity',
   'wasm',
 ]
 
 V8_BASE = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
 
 def main():
   parser = argparse.ArgumentParser(description='')
@@ skipping 39 matching lines @@
   if options.revision: cmd += ['-r %s' % options.revision]
   benchmarks = ['"%s"' % benchmark for benchmark in options.benchmarks]
   cmd += ['-p \'testfilter=[%s]\'' % ','.join(benchmarks)]
   if options.extra_flags:
     cmd += ['-p \'extra_flags="%s"\'' % options.extra_flags]
   subprocess.check_call(' '.join(cmd), shell=True, cwd=V8_BASE)
 
 
 if __name__ == '__main__':  # pragma: no cover
   sys.exit(main())