Refactor the way that TestApi works so that it is actually useful.

scripts/slave/recipes/run_presubmit.py

 # Copyright (c) 2013 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.
 
 DEPS = [
   'gclient',
   'git',
   'path',
   'properties',
   'rietveld',
@@ skipping 33 matching lines @@
     '--skip_canned', 'CheckTreeIsOpen',
     '--skip_canned', 'CheckBuildbotPendingBuilds',
     '--rietveld_url', api.properties['rietveld'],
     '--rietveld_email', '',  # activates anonymous mode
     '--rietveld_fetch'])
 
 
 def GenTests(api):
   for repo_name in ['blink', 'blink_bare', 'tools_build', 'chromium']:
     if 'blink' in repo_name:
-      props = api.properties_tryserver(
+      props = api.properties.tryserver(
         root='src/third_party/WebKit'
       )
     else:
-      props = api.properties_tryserver()
+      props = api.properties.tryserver()
 
     props['repo_name'] = repo_name
     yield repo_name, {
       'properties': props
     }