In update-w3c-test-expectations, handle failure to fetch results.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/layouttestresults.py

 # Copyright (c) 2010, 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
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@@ skipping 33 matching lines @@
     def test_name(self):
         return self._test_name
 
     def did_pass_or_run_as_expected(self):
         return self.did_pass() or self.did_run_as_expected()
 
     def did_pass(self):
         return 'PASS' in self.actual_results()
 
     def did_run_as_expected(self):
+        # TODO(qyearsley): For correctness, this should be:
+        #     return not self._result_dict.get('is_unexpected', False)
+        # (Right now for expected results it's not added to the result dict
+        # but in theory it could be present.)
         return 'is_unexpected' not in self._result_dict
 
     def is_missing_image(self):
+        # TODO(qyearsley): Change this to:
+        #     self._result_dict.get('is_missing_image', False)
+        # The following method should likewise be changed.
         return 'is_missing_image' in self._result_dict
 
     def is_missing_text(self):
         return 'is_missing_text' in self._result_dict
 
     def is_missing_audio(self):
         return 'is_missing_audio' in self._result_dict
 
     def actual_results(self):
         return self._result_dict['actual']
@@ skipping 85 matching lines @@
                 results.append(result)
 
         LayoutTestResults._for_each_test(self._test_result_tree(), add_if_passes)
         return sorted(results, key=lambda r: r.test_name())
 
     def unexpected_mismatch_results(self):
         return self._filter_tests(lambda r: r.has_mismatch_result() and not r.did_run_as_expected())
 
     def didnt_run_as_expected_results(self):
         return self._filter_tests(lambda r: not r.did_run_as_expected())