Add concept of bot config and test spec database (BotConfigAndTestDB).

scripts/slave/recipe_modules/chromium/example.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.
 
 DEPS = [
   'chromium',
   'chromium_tests',
   'recipe_engine/properties',
 ]
 
 def RunSteps(api):
   mastername = api.properties.get('mastername')
   buildername = api.properties.get('buildername')
 
   api.chromium_tests.configure_build(mastername, buildername)
-  update_step, master_dict, test_spec = \
+  update_step, bot_db = \
      api.chromium_tests.prepare_checkout(mastername, buildername)
-  #api.chromium_tests.compile(mastername, buildername, update_step, master_dict,
-  #                           test_spec, out_dir='/tmp')
+  #api.chromium_tests.compile(mastername, buildername, update_step, bot_db,
+  #                           out_dir='/tmp')
   api.chromium.compile(targets=['All'], out_dir='/tmp')
 
 def GenTests(api):
   yield api.test('basic_out_dir') + api.properties(
       mastername='chromium.linux',
       buildername='Android Builder (dbg)',
       slavename='build1-a1',
       buildnumber='77457',
   )