Improve test-serialize test cases.

tools/testrunner/local/testsuite.py

Index: tools/testrunner/local/testsuite.py
diff --git a/tools/testrunner/local/testsuite.py b/tools/testrunner/local/testsuite.py
index fd013d75684c1e47aa95039af6a33d2a90ae0e2b..b4b342503f2c7d4438d61032fb253cfd197a27df 100644
--- a/tools/testrunner/local/testsuite.py
+++ b/tools/testrunner/local/testsuite.py
@@ -102,7 +102,6 @@ class TestSuite(object):
 
   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
@@ -110,11 +109,6 @@ class TestSuite(object):
     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"