Handle tries of results data in upload (fix _is_directory).

Tools/TestResultServer/handlers/buildershandler_unittest.py

 # Copyright (C) 2012 Google Inc. All rights reserved.
 #
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 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
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 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 81 matching lines @@
             self.assertEqual(set(fetched_urls), set(expected_fetched_urls))
 
             expected_masters = {
                 'masters': [{
                     'tests': {
                         'browser_tests': {'builders': ['WebKit Linux', 'WebKit Mac']},
                         'mini_installer_test': {'builders': ['WebKit Linux', 'WebKit Mac', 'WebKit Win']},
                         'layout-tests': {'builders': ['WebKit Linux', 'WebKit Win']}},
                     'name': 'ChromiumWebkit',
                     'url_name': 'chromium.webkit',
-                    'groups': ['@ToT Chromium'],
+                    'groups': ['@ToT Chromium', '@ToT Blink'],

[ojan, 2014/08/15 00:26:19]

Whoops. This was my fault. Thx for fixing. I really need to add a script to run
all the TestResultServer python tests.

                 }],
                 "no_upload_test_types": buildershandler.TEST_STEPS_THAT_DO_NOT_UPLOAD_YET,
             }
             expected_json = buildershandler.dump_json(expected_masters)
 
             self.assertEqual(buildbot_data, expected_json)
         finally:
             buildershandler.fetch_json = old_fetch_json
 
     def test_fetch_buildbot_data_failure(self):
@@ skipping 48 matching lines @@
             with self.assertRaises(buildershandler.FetchBuildersException):
                 buildbot_data = buildershandler.fetch_buildbot_data([m['url_name'] for m in masters])
             self.assertEqual(set(expected_fetched_urls), set(fetched_urls))
 
         finally:
             buildershandler.fetch_json = old_fetch_json
 
 
 if __name__ == '__main__':
     unittest.main()