Flip remaining chromium_gn bots to the chromium recipe.

scripts/slave/recipe_modules/chromium/test_api.py

Index: scripts/slave/recipe_modules/chromium/test_api.py
diff --git a/scripts/slave/recipe_modules/chromium/test_api.py b/scripts/slave/recipe_modules/chromium/test_api.py
index 84ce0eff8a04cc5c9197714e02a5fd8f8ce219f0..2b1834e0a75786f1e086b16e1686c924d935a907 100644
--- a/scripts/slave/recipe_modules/chromium/test_api.py
+++ b/scripts/slave/recipe_modules/chromium/test_api.py
@@ -6,14 +6,13 @@ 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:
@@ -34,10 +33,6 @@ class ChromiumTestApi(recipe_test_api.RecipeTestApi):
           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