Support variable substitution and tryserver- and waterfall-only cmd line args.

scripts/slave/recipes/chromium_gn.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.types import freeze
 
 DEPS = [
   'bot_update',
   'chromium',
   'chromium_tests',
@@ skipping 116 matching lines @@
   # the runhooks step.
   api.chromium.runhooks()
 
   # TODO(dpranke): Unify this with the logic in the chromium_trybot and
   # chromium recipes so that we can actually run the tests as well
   # and deapply patches and retry as need be.
   test_spec_file = '%s.json' % mastername
   test_spec = api.chromium_tests.read_test_spec(api, test_spec_file)
 
   tests = list(api.chromium_tests.steps.generate_gtest(
-      api, mastername, buildername, test_spec))
+      api, api.chromium_tests, mastername, buildername, test_spec,
+      bot_update_step))
 
   scripts_compile_targets = \
       api.chromium_tests.get_compile_targets_for_scripts().json.output
   tests += list(api.chromium_tests.steps.generate_script(
-      api, mastername, buildername, test_spec,
-      scripts_compile_targets=scripts_compile_targets))
+      api, api.chromium_tests, mastername, buildername, test_spec,
+      bot_update_step, scripts_compile_targets=scripts_compile_targets))
 
   additional_compile_targets = test_spec.get(buildername, {}).get(
       'additional_compile_targets',
       ['chrome_public_apk' if is_android else 'all'])
 
   if api.tryserver.is_tryserver:
     affected_files = api.tryserver.get_files_affected_by_patch()
 
     test_targets = all_compile_targets(api, tests)
 
@@ skipping 102 matching lines @@
            'gtest_tests': ['base_unittests'],
         }})) +
     api.override_step_data(
         'analyze',
         api.json.output({
           'status': 'Found dependency',
           'test_targets': ['net_unittests'],
           'compile_targets': ['net_unittests'],
         }))
   )