In run_webkit_tests, use host.environ to access gtest shard env vars.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/run_webkit_tests.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 # Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
 # Copyright (C) 2011 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 12 matching lines @@
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import logging
 import optparse
-import os
 import sys
 import traceback
 
 from webkitpy.common.host import Host
 from webkitpy.common.system.executive import Executive
 from webkitpy.layout_tests.controllers.manager import Manager
 from webkitpy.layout_tests.models import test_run_results
 from webkitpy.layout_tests.port.factory import configuration_options, platform_options
 from webkitpy.layout_tests.views import buildbot_results
 from webkitpy.layout_tests.views import printing
@@ skipping 492 matching lines @@
 
         if not options.test_list:
             options.test_list = []
         options.test_list.append(port.host.filesystem.join(port.layout_tests_dir(), 'SmokeTests'))
         if not options.skipped:
             options.skipped = 'always'
 
     if not options.skipped:
         options.skipped = 'default'
 
-    if 'GTEST_SHARD_INDEX' in os.environ and 'GTEST_TOTAL_SHARDS' in os.environ:
-        shard_index = int(os.environ['GTEST_SHARD_INDEX']) + 1
-        total_shards = int(os.environ['GTEST_TOTAL_SHARDS']) + 1
+    if 'GTEST_SHARD_INDEX' in port.host.environ and 'GTEST_TOTAL_SHARDS' in port.host.environ:
+        shard_index = int(port.host.environ['GTEST_SHARD_INDEX']) + 1
+        total_shards = int(port.host.environ['GTEST_TOTAL_SHARDS']) + 1
         options.run_part = '{0}:{1}'.format(shard_index, total_shards)
 
 
 def _run_tests(port, options, args, printer):
     _set_up_derived_options(port, options, args)
     manager = Manager(port, options, printer)
     printer.print_config(port.results_directory())
     return manager.run(args)
 
 
@@ skipping 29 matching lines @@
             _log.debug("\t%s", process)
 
         return run_details
 
     finally:
         printer.cleanup()
 
 if __name__ == '__main__':
     exit_code = main(sys.argv[1:], sys.stdout, sys.stderr)
     sys.exit(exit_code)