Update from https://crrev.com/304121

testing/chromoting/browser_tests_launcher.py

 # Copyright (c) 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.
 
 
 """Utility script to launch browser-tests on the Chromoting bot."""
 import argparse
 import subprocess
 
 PROD_DIR_ID = '$(PROD_DIR)'
 
 
 def LaunchCommand(command):
 
   cmd_line = [command]
   try:
-    results = subprocess.check_output(
-        cmd_line, stderr=subprocess.STDOUT, shell=True)
+    p = subprocess.Popen(cmd_line, stdout=subprocess.PIPE, shell=True)
+    results, err = p.communicate()
+    if 'SUCCESS: all tests passed.' not in results:
+      raise Exception('Test failed\n%s\n%s' % (results, err))
   except subprocess.CalledProcessError, e:
     raise Exception('Exception %s running command %s' % (e, command))
   else:
     print results
-  finally:
-    pass
 
 
 def main():
 
   parser = argparse.ArgumentParser()
   parser.add_argument('-f', '--file',
                       help='path to file listing commands to be launched.')
   parser.add_argument('-p', '--prod_dir',
                       help='path to folder having product and test binaries.')
 
   args = parser.parse_args()
 
   with open(args.file) as f:
     for line in f:
       # Replace the PROD_DIR value in the command-line with
       # the passed in value.
       line = line.replace(PROD_DIR_ID, args.prod_dir)
       LaunchCommand(line)
 
 if __name__ == '__main__':
   main()