Update from chromium https://crrev.com/301725/

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 672 matching lines @@
     "ipc": TestIpc,              "ipc_tests": TestIpc,
     "installer_util": TestInstallerUtil,
     "interactive_ui": TestInteractiveUI,
     "jingle": TestJingle,        "jingle_unittests": TestJingle,
     "keyboard": TestKeyboard,    "keyboard_unittests": TestKeyboard,
     "layout": TestLayout,        "layout_tests": TestLayout,
     "media": TestMedia,          "media_unittests": TestMedia,
     "message_center": TestMessageCenter,
     "message_center_unittests" : TestMessageCenter,
     "mojo_common": TestMojoCommon,
+    "mojo_system": TestMojoSystem,
     "mojo_public_system": TestMojoPublicSystem,
     "mojo_public_utility": TestMojoPublicUtility,
     "mojo_public_bindings": TestMojoPublicBindings,
     "mojo_public_env": TestMojoPublicEnv,
     "mojo_public_sysperf": TestMojoPublicSysPerf,
     "net": TestNet,              "net_unittests": TestNet,
     "net_perf": TestNetPerf,     "net_perftests": TestNetPerf,
     "phonenumber": TestPhoneNumber,
     "libphonenumber_unittests": TestPhoneNumber,
     "ppapi": TestPPAPI,          "ppapi_unittests": TestPPAPI,
@@ skipping 81 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())