Fix number of times failures are rerun.

tools/testrunner/local/execution.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 86 matching lines @@
         "--stress-opt" in self.context.mode_flags or
         "--stress-opt" in self.context.extra_flags):
       timeout *= 4
     if test.dependency is not None:
       dep_command = [ c.replace(test.path, test.dependency) for c in command ]
     else:
       dep_command = None
     return Job(command, dep_command, test.id, timeout, self.context.verbose)
 
   def _MaybeRerun(self, pool, test):
-    if test.run <= self.context.rerun_failures_count + 1:
+    if test.run <= self.context.rerun_failures_count:
       # Possibly rerun this test if its run count is below the maximum per
-      # test. +1 as the flag controls reruns not including the first run.
+      # test. <= as the flag controls reruns not including the first run.
       if test.run == 1:
         # Count the overall number of reran tests on the first rerun.
         if self.reran_tests < self.context.rerun_failures_max:
           self.reran_tests += 1
         else:
           # Don't rerun this if the overall number of rerun tests has been
           # reached.
           return
       if test.run >= 2 and test.duration > self.context.timeout / 20.0:
         # Rerun slow tests at most once.
@@ skipping 128 matching lines @@
            test.suite.GetFlagsForTestCase(test, self.context) +
            self.context.extra_flags)
     return cmd
 
 
 class BreakNowException(Exception):
   def __init__(self, value):
     self.value = value
   def __str__(self):
     return repr(self.value)