Improve test-serialize test cases.

tools/testrunner/local/testsuite.py

 # Copyright 2012 the V8 project authors. 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.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 84 matching lines @@
       return module.GetSuite(name, root)
     except ImportError:
       # Use default if no testcfg is present.
       return GoogleTestSuite(name, root)
     finally:
       if f:
         f.close()
 
   def __init__(self, name, root):
     # Note: This might be called concurrently from different processes.
-    # Changing harddisk state should be done in 'SetupWorkingDirectory' below.
     self.name = name  # string
     self.root = root  # string containing path
     self.tests = None  # list of TestCase objects
     self.rules = None  # dictionary mapping test path to list of outcomes
     self.wildcards = None  # dictionary mapping test paths to list of outcomes
     self.total_duration = None  # float, assigned on demand
 
-  def SetupWorkingDirectory(self):

[Michael Achenbach, 2016/03/10 09:26:46]

Please also remove the call in v8/tools/testrunner/network/endpoint.py

[Yang, 2016/03/10 09:33:50]

Thanks. I missed this one.

-    # This is called once per test suite object in a multi-process setting.
-    # Multi-process-unsafe work-directory setup can go here.
-    pass
-
   def shell(self):
     return "d8"
 
   def suffix(self):
     return ".js"
 
   def status_file(self):
     return "%s/%s.status" % (self.root, self.name)
 
   # Used in the status file and for stdout printing.
@@ skipping 209 matching lines @@
     return (testcase.flags + ["--gtest_filter=" + testcase.path] +
             ["--gtest_random_seed=%s" % context.random_seed] +
             ["--gtest_print_time=0"] +
             context.mode_flags)
 
   def _VariantGeneratorFactory(self):
     return StandardVariantGenerator
 
   def shell(self):
     return self.name