Remove kChildCleanExit since it's not used anymore.

chrome/test/functional/test_clean_exit.py

Index: chrome/test/functional/test_clean_exit.py
===================================================================
--- chrome/test/functional/test_clean_exit.py	(revision 260245)
+++ chrome/test/functional/test_clean_exit.py	(working copy)
@@ -1,51 +0,0 @@
-#!/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.
-
-import logging
-import os
-import signal
-import subprocess
-import tempfile
-import unittest
-
-import pyauto_functional
-import pyauto
-import test_utils
-
-
-class SimpleTest(pyauto.PyUITest):
-
-  def ExtraChromeFlags(self):
-    """Ensures Chrome is launched with custom flags.
-
-    Returns:
-      A list of extra flags to pass to Chrome when it is launched.
-    """
-    fd, self._strace_log = tempfile.mkstemp()
-    os.close(fd)
-    extra_flags = ['--no-sandbox', '--child-clean-exit',
-                   '--renderer-cmd-prefix=/usr/bin/strace -o %s' %
-                    self._strace_log]
-    logging.debug('Strace file is: %s' % self._strace_log)
-    return pyauto.PyUITest.ExtraChromeFlags(self) + extra_flags
-
-
-  def testCleanExit(self):
-    """Ensures the renderer process cleanly exits."""
-    url = self.GetHttpURLForDataPath('title2.html')
-    self.NavigateToURL(url)
-    os.kill(self.GetBrowserInfo()['browser_pid'], signal.SIGINT)
-    self.WaitUntil(lambda: self._IsFileOpen(self._strace_log))
-    strace_contents = open(self._strace_log).read()
-    self.assertTrue('exit_group' in strace_contents)
-    os.remove(self._strace_log)
-
-  def _IsFileOpen(self, filename):
-    p = subprocess.Popen(['lsof', filename])
-    return p.communicate()[0] == ''
-
-
-if __name__ == '__main__':
-  pyauto_functional.Main()