Update from chromium https://crrev.com/302282

testing/scripts/common.py

 # Copyright 2014 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.
 
 import argparse
 import contextlib
 import json
 import os
 import subprocess
+import sys
 import tempfile
 
 
 SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))
 SRC_DIR = os.path.abspath(
     os.path.join(SCRIPT_DIR, os.path.pardir, os.path.pardir))
 
 
 # run-webkit-tests returns the number of failures as the return
 # code, but caps the return code at 101 to avoid overflow or colliding
@@ skipping 28 matching lines @@
   return args.func(args)
 
 
 def run_command(argv):
   print 'Running %r' % argv
   rc = subprocess.call(argv)
   print 'Command %r returned exit code %d' % (argv, rc)
   return rc
 
 
+def run_runtest(cmd_args, runtest_args):
+  return run_command([
+      sys.executable,
+      os.path.join(cmd_args.paths['build'], 'scripts', 'tools', 'runit.py'),
+      '--show-path',
+      sys.executable,
+      os.path.join(cmd_args.paths['build'], 'scripts', 'slave', 'runtest.py'),
+      '--target', cmd_args.build_config_fs,
+      '--xvfb',
+      '--builder-name', cmd_args.properties['buildername'],
+      '--slave-name', cmd_args.properties['slavename'],
+      '--build-number', str(cmd_args.properties['buildnumber']),
+  ] + runtest_args)
+
+
 @contextlib.contextmanager
 def temporary_file():
   fd, path = tempfile.mkstemp()
   os.close(fd)
   try:
     yield path
   finally:
     os.remove(path)
 
 
@@ skipping 40 matching lines @@
       key += 'passes'
       # TODO(dpranke): crbug.com/357867 ...  Why are we assigning result
       # instead of actual_result here. Do we even need these things to be
       # hashes, or just lists?
       data = result
     else:
       key += 'failures'
     results[key][test] = data
 
   return results