Move builders.py and steps.py to chromium_tests.

scripts/slave/recipe_modules/chromium/test_api.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.
 
 from recipe_engine import recipe_test_api
 
-from . import builders
-
 
 class ChromiumTestApi(recipe_test_api.RecipeTestApi):
-  @property
-  def builders(self):
-    return builders.BUILDERS
-
   def gen_tests_for_builders(self, builder_dict, overrides=None):
     # TODO: crbug.com/354674. Figure out where to put "simulation"
     # tests. Is this really the right place?
 
     def _sanitize_nonalpha(text):
       return ''.join(c if c.isalnum() else '_' for c in text)
 
     overrides = overrides or {}
     for mastername in builder_dict:
       for buildername in builder_dict[mastername]['builders']:
@@ skipping 13 matching lines @@
                                               mastername=mastername)
         else:
           test += self.m.properties.generic(buildername=buildername,
                                             mastername=mastername)
 
         override_step_data = overrides.get(mastername, {}).get(buildername,
                                                                None)
         if override_step_data:
             test += override_step_data
         yield test