[test] Add mksnapshot stress test suite

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 80 matching lines @@
 
   def shell(self):
     return "d8"
 
   def suffix(self):
     return ".js"
 
   def status_file(self):
     return "%s/%s.status" % (self.root, self.name)
 
+  def Setup(self):
+    pass
+
+  def TearDown(self):
+    pass
+
   # Used in the status file and for stdout printing.
   def CommonTestName(self, testcase):
     if utils.IsWindows():
       return testcase.path.replace("\\", "/")
     else:
       return testcase.path
 
   def ListTests(self, context):
     raise NotImplementedError
 
@@ skipping 246 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