Mark json results failures as unexpected in python tests.

mojo/tools/run_mojo_python_tests.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 import argparse
 import json
 import os
 import sys
 import time
@@ skipping 77 matching lines @@
   failed_test_names = _FailedTestNames(result)
 
   full_results['num_failures_by_type'] = {
       'FAIL': len(failed_test_names),
       'PASS': len(all_test_names) - len(failed_test_names),
   }
 
   full_results['tests'] = {}
 
   for test_name in all_test_names:
-    value = {
-        'expected': 'PASS',
-        'actual': 'FAIL' if (test_name in failed_test_names) else 'PASS',
-    }
+    value = {}
+    value['expected'] = 'PASS'
+    if test_name in failed_test_names:
+      value['actual'] = 'FAIL'
+      value['is_unexpected'] = True
+    else:
+      value['actual'] = 'PASS'
     _AddPathToTrie(full_results['tests'], test_name, value)
 
   return full_results
 
 
 def _AllTestNames(suite):
   test_names = []
   # _tests is protected  pylint: disable=W0212
   for test in suite._tests:
     if isinstance(test, unittest.suite.TestSuite):
@@ skipping 12 matching lines @@
     trie[path] = value
     return
   directory, rest = path.split(TEST_SEPARATOR, 1)
   if directory not in trie:
     trie[directory] = {}
   _AddPathToTrie(trie[directory], rest, value)
 
 
 if __name__ == '__main__':
   sys.exit(main())