Fix webdriver_test_setup script for installing with correct permissions on nonWindows machines.

tools/testing/webdriver_test_setup.py

 #!/usr/bin/python
 
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Run to install the necessary components to run webdriver on the buildbots or
 # on your local machine. 
 # Note: The setup steps can be done fairly easily by hand. This script is 
 # intended to simply and reduce the time for setup since there are a fair number
@@ skipping 116 matching lines @@
 
   def run(self):
     """Download and install the Google Code."""
     print 'Installing from %s' % self.project_name
     os_str = self.get_os_str
     version = self.find_latest_version()
     download_name = self.download_name_func({'os': os_str, 'version': version})
     urllib.urlretrieve(self.google_code_download() + '/' + download_name,
         os.path.join(self.download_location, download_name))
     if download_name.endswith('.zip'):
-      z = zipfile.ZipFile(os.path.join(self.download_location, download_name))
-      z.extractall(self.download_location)
-      z.close()
+      if platform.system() != 'Windows':
+        # The Python zip utility does not preserve executable permissions, but
+        # this does not seem to be a problem for Windows, which does not have a
+        # built in zip utility. :-/
+        run_cmd('unzip -u %s -d %s' % (os.path.join(self.download_location,
+                download_name), self.download_location))
+      else:
+        z = zipfile.ZipFile(os.path.join(self.download_location, download_name))
+        z.extractall(self.download_location)
+        z.close()
       os.remove(os.path.join(self.download_location, download_name))
 
   @property
   def get_os_str(self):
     """The strings to indicate what OS a download is for as used on Google Code.
     """
     os_str = 'win'
     if 'darwin' in sys.platform:
       os_str = 'mac'
     elif 'linux' in sys.platform:
@@ skipping 95 matching lines @@
       lambda x: 'chromedriver_%(os)s_%(version)s.zip' % x).run()
   if 'win32' not in sys.platform and 'cygwin' not in sys.platform:
     GoogleCodeInstaller('selenium', os.path.dirname(os.path.abspath(__file__)),
         lambda x: 'selenium-server-standalone-%(version)s.jar' % x).run()
 
   if args.firefox:
     FirefoxInstaller().run()
 
 if __name__ == '__main__':
   main()