Fix python scripts in src/tools/

tools/dromaeo_benchmark_runner/dromaeo_benchmark_runner.py

 #!/usr/bin/env python
-#
-# Copyright 2009 Google Inc. All Rights Reserved.
+# Copyright (c) 2011 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.
 
 """Dromaeo benchmark automation script.
 
 Script runs dromaeo tests in browsers specified by --browser switch and saves
 results to a spreadsheet on docs.google.com.
 
 Prerequisites:
 1. Install Google Data APIs Python Client Library from
    http://code.google.com/p/gdata-python-client.
 2. Checkout Dromaeo benchmark from
@@ skipping 27 matching lines @@
 import time
 import urlparse
 from optparse import OptionParser
 from BaseHTTPServer import HTTPServer
 import SimpleHTTPServer
 import gdata.spreadsheet.service
 
 max_spreadsheet_columns = 20
 test_props = ['mean', 'error']
 
+
 def ParseArguments():
   parser = OptionParser()
   parser.add_option("-b", "--browser",
                     action="append", dest="browsers",
                     help="list of browsers to test")
   parser.add_option("-n", "--run_count", dest="run_count", type="int",
                     default=5, help="number of runs")
   parser.add_option("-d", "--dromaeo_home", dest="dromaeo_home",
                     help="directory with your dromaeo files")
   parser.add_option("-p", "--port", dest="port", type="int",
@@ skipping 189 matching lines @@
       benchmark_results.ProcessBrowserPostData(server.post_data)
       # Kill browser.
       KillProcessByName(browser)
       browser_process.wait()
 
     # Insert test results into spreadsheet.
     for (test_name, test_data) in benchmark_results.data.iteritems():
       spreadsheet_writer.WriteBrowserBenchmarkResults(test_name, test_data)
 
   server.socket.close()
+  return 0
+
 
 if __name__ == '__main__':
-  main()
-
+  sys.exit(main())