Fix presubmit check with newer version of AppEngine SDK v1.7.6.

testing_support/local_rietveld.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.
 
 """Setups a local Rietveld instance to test against a live server for
 integration tests.
 
 It makes sure Google AppEngine SDK is found, download Rietveld and Django code
 if necessary and starts the server on a free inbound TCP port.
@@ skipping 121 matching lines @@
     while not test_port(self.port):
       self.test_server.poll()
       if self.test_server.returncode is not None:
         raise Failure(
             'Test rietveld instance failed early on port %s' %
             self.port)
       time.sleep(0.01)
 
   def stop_server(self):
     if self.test_server:
-      self.test_server.kill()
+      try:
+        self.test_server.kill()
+      except OSError:
+        pass
       self.test_server.wait()
       self.test_server = None
       self.port = None
 
 
 def main():
   parser = optparse.OptionParser()
   parser.add_option('-v', '--verbose', action='store_true')
   options, args = parser.parse_args()
   if args:
     parser.error('Unknown arguments: %s' % ' '.join(args))
   instance = LocalRietveld()
   try:
     instance.start_server(verbose=options.verbose)
     print 'Local rietveld instance started on port %d' % instance.port
     while True:
       time.sleep(0.1)
   finally:
     instance.stop_server()
 
 
 if __name__ == '__main__':
   main()