Update from https://crrev.com/303153

tools/valgrind/chrome_tests.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 ''' Runs various chrome tests through valgrind_test.py.'''
 
 import glob
 import logging
 import multiprocessing
@@ skipping 130 matching lines @@
       # Valgrind runs tests slowly, so slow tests hurt more; show elapased time
       # so we can find the slowpokes.
       cmd.append("--gtest_print_time")
       # Built-in test launcher for gtest-based executables runs tests using
       # multiple process by default. Force the single-process mode back.
       cmd.append("--single-process-tests")
     if self._options.gtest_repeat:
       cmd.append("--gtest_repeat=%s" % self._options.gtest_repeat)
     if self._options.gtest_shuffle:
       cmd.append("--gtest_shuffle")
+    if self._options.gtest_break_on_failure:
+      cmd.append("--gtest_break_on_failure")
     if self._options.brave_new_test_launcher:
       cmd.append("--brave-new-test-launcher")
     if self._options.test_launcher_bot_mode:
       cmd.append("--test-launcher-bot-mode")
     return cmd
 
   def Run(self):
     ''' Runs the test specified by command-line argument --test '''
     logging.info("running test %s" % (self._test))
     return self._test_list[self._test](self)
@@ skipping 569 matching lines @@
   parser.add_option("-t", "--test", action="append", default=[],
                     help="which test to run, supports test:gtest_filter format "
                          "as well.")
   parser.add_option("--baseline", action="store_true", default=False,
                     help="generate baseline data instead of validating")
   parser.add_option("--gtest_filter",
                     help="additional arguments to --gtest_filter")
   parser.add_option("--gtest_repeat", help="argument for --gtest_repeat")
   parser.add_option("--gtest_shuffle", action="store_true", default=False,
                     help="Randomize tests' orders on every iteration.")
+  parser.add_option("--gtest_break_on_failure", action="store_true",
+                    default=False,
+                    help="Drop in to debugger on assertion failure. Also "
+                         "useful for forcing tests to exit with a stack dump "
+                         "on the first assertion failure when running with "
+                         "--gtest_repeat=-1")
   parser.add_option("-v", "--verbose", action="store_true", default=False,
                     help="verbose output - enable debug log messages")
   parser.add_option("--tool", dest="valgrind_tool", default="memcheck",
                     help="specify a valgrind tool to run the tests under")
   parser.add_option("--tool_flags", dest="valgrind_tool_flags", default="",
                     help="specify custom flags for the selected valgrind tool")
   parser.add_option("--keep_logs", action="store_true", default=False,
                     help="store memory tool logs in the <tool>.logs directory "
                          "instead of /tmp.\nThis can be useful for tool "
                          "developers/maintainers.\nPlease note that the <tool>"
@@ skipping 35 matching lines @@
 
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret: return ret
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(_main())