Give time to free the port when shutting down apache on OSX.

tools/python/google/platform_utils_mac.py

 # Copyright (c) 2011 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.
 
 """Platform-specific utility methods shared by several scripts."""
 
 import os
 import subprocess
 
 import google.path_utils
@@ skipping 122 matching lines @@
   def GetStopHttpdCommand(self):
     """Returns a list of strings that contains the command line+args needed to
     stop the http server used in the http tests.
 
     This tries to fetch the pid of httpd (if available) and returns the
     command to kill it. If pid is not available, kill all httpd processes
     """
 
     if not self._httpd_cmd_string:
       return ["true"]   # Haven't been asked for the start cmd yet. Just pass.
-    return [self._bash, "-c", self._httpd_cmd_string + ' -k stop']
+    # Add a sleep after the shutdown because sometimes it takes some time for
+    # the port to be available again.
+    return [self._bash, "-c", self._httpd_cmd_string + ' -k stop && sleep 5']