Add diagnostic information to help track down why the Purify layout tests...

webkit/tools/layout_tests/run_webkit_tests.py

 #!/bin/env python
 # Copyright (c) 2006-2008 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.
 
 """Run layout tests using the test_shell.
 
 This is a port of the existing webkit test script run-webkit-tests.
 
 The TestRunner class runs a series of tests (TestType interface) against a set
@@ skipping 83 matching lines @@
       self._ParseExpectations('linux', is_debug_mode=True)
       self._ParseExpectations('linux', is_debug_mode=False)
     else:
       self._GatherTestFiles(paths)
       self._expectations = self._ParseExpectations(
           platform_utils.GetTestListPlatformName().lower(),
           options.target == 'Debug')
       self._PrepareListsAndPrintOutput()
 
   def __del__(self):
+    logging.info("flushing stdout")
     sys.stdout.flush()
+    logging.info("flushing stderr")
     sys.stderr.flush()
+    logging.info("stopping http server")
     # Stop the http server.
     self._http_server.Stop()
 
   def _GatherTestFiles(self, paths):
     """Generate a set of test files and place them in self._test_files
 
     Args:
       paths: a list of command line paths relative to the webkit/tests
              directory.  glob patterns are ok.
     """
@@ skipping 684 matching lines @@
   option_parser.add_option("", "--run-chunk",
                            default=None,
                            help=("Run a specified chunk (n:l), the nth of len l"
                                  ", of the layout tests"))
   option_parser.add_option("", "--batch-size",
                            default=None,
                            help=("Run a the tests in batches (n), after every "
                                  "n tests, the test shell is relaunched."))
   options, args = option_parser.parse_args()
   main(options, args)