Get rid of usage of old Swarming API in tests.

appengine/swarming/handlers_api_test.py

 #!/usr/bin/env python
 # coding: utf-8
 # Copyright 2014 The Swarming Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 import base64
 import datetime
 import logging
 import os
@@ skipping 28 matching lines @@
         extra_environ={
           'REMOTE_ADDR': self.source_ip,
           'SERVER_SOFTWARE': os.environ['SERVER_SOFTWARE'],
         })
     self.mock(
         ereporter2, 'log_request',
         lambda *args, **kwargs: self.fail('%s, %s' % (args, kwargs)))
     # Client API test cases run by default as user.
     self.set_as_user()
 
+  def get_client_token(self):
+    """Gets the XSRF token for client after handshake."""
+    headers = {'X-XSRF-Token-Request': '1'}
+    params = {}
+    response = self.app.post_json(
+        '/swarming/api/v1/client/handshake',
+        headers=headers,
+        params=params).json
+    return response['xsrf_token'].encode('ascii')
+
   def test_list(self):
     self.set_as_anonymous()
     response = self.app.get('/swarming/api/v1/client/list').json
     expected = {
       u'bot/<bot_id:[^/]+>': u'Bot\'s meta data',
       u'bot/<bot_id:[^/]+>/tasks': u'Tasks executed on a specific bot',
       u'bots': u'Bots known to the server',
       u'list': u'All query handlers',
       u'server': u'Server details',
       u'task/<task_id:[0-9a-f]+>': u'Task\'s result meta data',
@@ skipping 867 matching lines @@
     self.assertEqual(expected, actual)
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.CRITICAL,
       format='%(levelname)-7s %(filename)s:%(lineno)3d %(message)s')
   unittest.main()