Add WPTManifest log line to diagnose slow manifest generation

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/manager.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 # Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 83 matching lines @@
         self._webkit_finder = WebKitFinder(port.host.filesystem)
         self._runner = LayoutTestRunner(self._options, self._port, self._printer, self._results_directory, self._test_is_slow)
 
     def run(self, args):
         """Run the tests and return a RunDetails object with the results."""
         start_time = time.time()
         self._printer.write_update("Collecting tests ...")
         running_all_tests = False
 
         self._printer.write_update('Generating MANIFEST.json for web-platform-tests ...')
-        WPTManifest.ensure_manifest(self._port.host)
+
+        try:
+            _log.info('run-webkit-tests - calling ensure_manifest')
+            WPTManifest.ensure_manifest(self._port.host)
+        finally:
+            _log.info('run-webkit-tests - completed ensure_manfiest')
 
         try:
             paths, all_test_names, running_all_tests = self._collect_tests(args)
         except IOError:
             # This is raised if --test-list doesn't exist
             return test_run_results.RunDetails(exit_code=exit_codes.NO_TESTS_EXIT_STATUS)
 
         # Create a sorted list of test files so the subset chunk,
         # if used, contains alphabetically consecutive tests.
         if self._options.order == 'natural':
@@ skipping 435 matching lines @@
 
         stats = {}
         for result in initial_results.results_by_name.values():
             if result.type != test_expectations.SKIP:
                 stats[result.test_name] = {'results': (_worker_number(result.worker_name), result.test_number, result.pid, int(
                     result.test_run_time * 1000), int(result.total_run_time * 1000))}
         stats_trie = {}
         for name, value in stats.iteritems():
             json_results_generator.add_path_to_trie(name, value, stats_trie)
         return stats_trie