webrtc: drop dependency on chromium_tests; extract chromium_swarming

scripts/slave/recipe_modules/webrtc/api.py

 # Copyright 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.
 
 from recipe_engine.types import freeze
 from recipe_engine import recipe_api
 from . import builders
 from . import steps
 
 
@@ skipping 115 matching lines @@
 
     if self.m.tryserver.is_tryserver:
       self.m.chromium.apply_config('trybot_flavor')
 
     self.c.use_isolate = self.bot_config.get('use_isolate')
     if self.c.use_isolate:
       self.m.isolate.set_isolate_environment(self.m.chromium.c)
 
     self.c.enable_swarming = self.bot_config.get('enable_swarming')
     if self.c.enable_swarming:
-      self.m.chromium_tests.configure_swarming(
+      self.m.chromium_swarming.configure_swarming(
           'webrtc',
           precommit=self.m.tryserver.is_tryserver,
           mastername=mastername)
       self.m.swarming.set_default_dimension(
           'os',
           self.m.swarming.prefered_os_dimension(
               self.m.platform.name).split('-', 1)[0])
 
   def checkout(self, **kwargs):
     update_step = self.m.bot_update.ensure_checkout(**kwargs)
@@ skipping 149 matching lines @@
   def clean_test_output(self):
     """Remove all test output in out/, since we have tests leaking files."""
     out_dir = self.m.path['checkout'].join('out')
     self.m.python('clean test output files',
                   script=self.resource('cleanup_files.py'),
                   args=[out_dir],
                   infra_step=True)
 
   def virtual_webcam_check(self):
     self.m.python('webcam_check', self.resource('ensure_webcam_is_running.py'))