Avoid to use environment.

scripts/slave/recipe_modules/chromium/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.
 
 import re
 
 from recipe_engine import recipe_api
 from recipe_engine import util as recipe_util
 
 class TestLauncherFilterFileInputPlaceholder(recipe_util.InputPlaceholder):
@@ skipping 159 matching lines @@
       '--show-path',
       'python',
       self.package_repo_resource('scripts', 'slave', 'compile.py'),
       '--gsutil-py-path', self.m.depot_tools.gsutil_py_path,
       '--ninja-path', self.m.depot_tools.ninja_path,
       '--target', target or self.c.build_config_fs,
       '--src-dir', self.m.path['checkout'],
       '--goma-cache-dir', self.m.path['goma_cache'],
     ]
 
+    # Set some buildbot info used in goma_utils.
+    for key in ['buildername', 'mastername', 'slavename', 'clobber']:
+      if key in self.m.properties:
+        args.extend([
+            '--buildbot-%s' % key, self.m.properties[key]
+        ])
+
     # Use explicit goma deps cache dir if it's set in the path config.
     # Otherwise use the default one inside build output directory.
     try:
       args.extend(['--goma-deps-cache-dir', self.m.path['goma_deps_cache']])
     except KeyError:
       pass
 
     if self.c.compile_py.build_args:
       args += ['--build-args', self.c.compile_py.build_args]
     if self.m.properties.get('build_data_dir'):
@@ skipping 605 matching lines @@
       }))
 
   def get_annotate_by_test_name(self, test_name):
     return 'graphing'
 
   def download_lto_plugin(self):
     return self.m.python(
         name='download LTO plugin',
         script=self.m.path['checkout'].join(
             'build', 'download_gold_plugin.py'))