Fix typo in test results config

appengine/test_results/appengine_module/test_results/handlers/master_config.py

 # 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.
 
 # FIXME: Master name is deprecated. Remove it once all the bots have stopped
 # uploading with that name.
 #
 # FIXME: The concept of groups is being deprecated.  Once it's removed from
 # the flakiness dashboard, this whole map can go away.
 _masters = {
@@ skipping 49 matching lines @@
     'client.webrtc': {
         'name': 'WebRTC',
         'groups': ['@ToT WebRTC']
     },
     'tryserver.blink': {
         'name': 'BlinkTryServer',
         'groups': ['Unused']
     },
     'tryserver.chromium.android': {
         'name': 'TryserverChromiumAndroid',
-        'group': ['Unused'],
+        'groups': ['Unused'],
     },
     'tryserver.chromium.linux': {
         'name': 'TryServerChromiumLinux',
         'groups': ['Unused']
     },
     'tryserver.chromium.mac': {
         'name': 'TryServerChromiumMac',
         'groups': ['Unused']
     },
     'tryserver.chromium.win': {
@@ skipping 21 matching lines @@
 def getMasterByMasterName(master_name):  # pragma: no cover
   url_name = _master_name_to_url_name.get(master_name)
   if url_name:
     return getMaster(url_name)
   return None
 
 
 def getAllMasters():  # pragma: no cover
   for master in _masters:
     yield getMaster(master)