Update from https://crrev.com/315085

tools/valgrind/chrome_tests.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 ''' Runs various chrome tests through valgrind_test.py.'''
 
 import glob
 import logging
 import multiprocessing
@@ skipping 549 matching lines @@
     jobs = max(1, int(multiprocessing.cpu_count() * 0.3))
     script_cmd = ["python", script, "-v",
                   # run a separate DumpRenderTree for each test
                   "--batch-size=1",
                   "--fully-parallel",
                   "--child-processes=%d" % jobs,
                   "--time-out-ms=800000",
                   "--no-retry-failures",  # retrying takes too much time
                   # http://crbug.com/176908: Don't launch a browser when done.
                   "--no-show-results",
-                  "--nocheck-sys-deps"]
+                  "--nocheck-sys-deps",
+                  "--additional-drt-flag=--no-sandbox"]
     # Pass build mode to run-webkit-tests.  We aren't passed it directly,
     # so parse it out of build_dir.  run-webkit-tests can only handle
     # the two values "Release" and "Debug".
     # TODO(Hercules): unify how all our scripts pass around build mode
     # (--mode / --target / --build-dir / --debug)
     if self._options.build_dir:
       build_root, mode = os.path.split(self._options.build_dir)
       script_cmd.extend(["--build-directory", build_root, "--target", mode])
     if (chunk_size > 0):
       script_cmd.append("--run-chunk=%d:%d" % (chunk_num, chunk_size))
@@ skipping 216 matching lines @@
 
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret: return ret
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(_main())