Add infrastructure for skipping tests in GC stress mode.

tools/run-deopt-fuzzer.py

 #!/usr/bin/env python
 #
 # 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
@@ skipping 345 matching lines @@
   timeout *= TIMEOUT_SCALEFACTOR[mode]
   ctx = context.Context(arch, mode, shell_dir,
                         mode_flags, options.verbose,
                         timeout, options.isolates,
                         options.command_prefix,
                         options.extra_flags,
                         False)
 
   # Find available test suites and read test cases from them.
   variables = {
+    "arch": arch,
+    "deopt_fuzzer": True,
+    "gc_stress": False,
+    "isolates": options.isolates,
     "mode": mode,
-    "arch": arch,
+    "no_i18n": False,
     "system": utils.GuessOS(),
-    "isolates": options.isolates,
-    "deopt_fuzzer": True,
-    "no_i18n": False,
   }
   all_tests = []
   num_tests = 0
   test_id = 0
 
   # Remember test case prototypes for the fuzzing phase.
   test_backup = dict((s, []) for s in suites)
 
   for s in suites:
     s.ReadStatusFile(variables)
@@ skipping 78 matching lines @@
       return exit_code
 
   except KeyboardInterrupt:
     return 1
 
   return exit_code
 
 
 if __name__ == "__main__":
   sys.exit(Main())