[test] Deprecate test data download for most test suites

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 107 matching lines @@
   def CreateVariantGenerator(self, variants):
     """Return a generator for the testing variants of this suite.
 
     Args:
       variants: List of variant names to be run as specified by the test
                 runner.
     Returns: An object of type VariantGenerator.
     """
     return self._VariantGeneratorFactory()(self, set(variants))
 
+  def PrepareSources(self):
+    """Called once before multiprocessing for doing file-system operations.
+
+    This should not access the network. For network access use the method
+    below.
+    """
+    pass
+
   def DownloadData(self):
     pass
 
   def ReadStatusFile(self, variables):
     with open(self.status_file()) as f:
       self.rules, self.wildcards = (
           statusfile.ReadStatusFile(f.read(), variables))
 
   def ReadTestCases(self, context):
     self.tests = self.ListTests(context)
@@ skipping 205 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