In print-stale-test-expectations-entries, avoid repeating the same request.

third_party/WebKit/Tools/Scripts/print-stale-test-expectations-entries

 #!/usr/bin/python
 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 34 matching lines @@
 
 google_code_url = 'https://www.googleapis.com/projecthosting/v2/projects/chromium/issues/%s?key=AIzaSyDgCqT1Dt5AZWLHo4QJjyMHaCjhnFacGF0'
 crbug_prefix = 'crbug.com/'
 
 
 class StaleTestPrinter(object):
 
     def __init__(self, options):
         self.days = options.days
         self.create_csv = options.create_csv
+        self.is_stale_results = {}
 
     def is_stale(self, bug_link):
+        if bug_link in self.is_stale_results:
+            return self.is_stale_results[bug_link]
+        # In case there's an error in the request, don't make the same request again.
+        self.is_stale_results[bug_link] = False
         bug_number = bug_link.strip(crbug_prefix)
         url = google_code_url % bug_number
         response = urllib2.urlopen(url)
         parsed = json.loads(response.read())
         last_updated = parsed['updated']
         parsed_time = datetime.datetime.strptime(last_updated.split(".")[0] + "UTC", "%Y-%m-%dT%H:%M:%S%Z")
         time_delta = datetime.datetime.now() - parsed_time
-        return time_delta.days > self.days
+        self.is_stale_results[bug_link] = time_delta.days > self.days
+        return self.is_stale_results[bug_link]
 
     def print_stale_tests(self):
         host = Host()
         port = host.port_factory.get()
         exps = port.expectations_dict()
         csv_contents = ''
         parser = TestExpectationParser(port, all_tests=(), is_lint_mode=False)
         for line in parser.parse(*exps.items()[0]):
             bugs, name = line.bugs, line.name
             try:
@@ skipping 21 matching lines @@
         default=0,
         help='Generate a CSV of the stale entries as well. Followed by the filename.'),
     options, args = option_parser.parse_args(argv)
 
     printer = StaleTestPrinter(options)
     printer.print_stale_tests()
     return 0
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv[1:]))