Flip remaining chromium_gn bots to the chromium recipe.

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
 
 
 class ChromiumTestApi(recipe_test_api.RecipeTestApi):
-  def gen_tests_for_builders(self, builder_dict, overrides=None):
+  def gen_tests_for_builders(self, builder_dict):
     # 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']:
         if 'mac' in buildername or 'Mac' in buildername:
           platform_name = 'mac'
         elif 'win' in buildername or 'Win' in buildername:
           platform_name = 'win'
         else:
           platform_name = 'linux'
         test = (
             self.test('full_%s_%s' % (_sanitize_nonalpha(mastername),
                                       _sanitize_nonalpha(buildername))) +
             self.m.platform.name(platform_name)
         )
         if mastername.startswith('tryserver'):
           test += self.m.properties.tryserver(buildername=buildername,
                                               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
 
   # The following data was generated by running 'gyp_chromium
   # --analyzer' with input JSON files corresponding to changes
   # affecting these targets.
   @property
   def analyze_builds_nothing(self):
     return self.m.json.output({
         'status': 'No dependencies',
         'compile_targets': [],
         'test_targets': [],
         })