Change logging statements to not use the "%" operator.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/run_webkit_tests.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 # Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
 # Copyright (C) 2011 Apple Inc. All rights reserved.
 #
 # 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.
@@ skipping 493 matching lines @@
     if options.pixel_test_directories:
         options.pixel_tests = True
         verified_dirs = set()
         pixel_test_directories = options.pixel_test_directories
         for directory in pixel_test_directories:
             # FIXME: we should support specifying the directories all the ways we support it for additional
             # arguments specifying which tests and directories to run. We should also move the logic for that
             # to Port.
             filesystem = port.host.filesystem
             if not filesystem.isdir(filesystem.join(port.layout_tests_dir(), directory)):
-                _log.warning("'%s' was passed to --pixel-test-directories, which doesn't seem to be a directory" % str(directory))
+                _log.warning("'%s' was passed to --pixel-test-directories, which doesn't seem to be a directory", str(directory))
             else:
                 verified_dirs.add(directory)
 
         options.pixel_test_directories = list(verified_dirs)
 
     if options.run_singly:
         options.batch_size = 1
         options.verbose = True
 
     if not args and not options.test_list and options.smoke is None:
@@ skipping 36 matching lines @@
             bot_printer = buildbot_results.BuildBotPrinter(stdout, options.debug_rwt_logging)
             bot_printer.print_results(run_details)
             stdout.flush()
 
             _log.debug("Generating dashboard...")
             gen_dash_board = DashBoardGenerator(port)
             gen_dash_board.generate()
             _log.debug("Dashboard generated.")
 
         _log.debug("")
-        _log.debug("Testing completed, Exit status: %d" % run_details.exit_code)
+        _log.debug("Testing completed, Exit status: %d", run_details.exit_code)
 
         # Temporary process dump for debugging windows timeout issues, see crbug.com/522396.
         _log.debug("")
         _log.debug("Process dump:")
         for process in port.host.executive.process_dump():
-            _log.debug("\t%s" % process)
+            _log.debug("\t%s", process)
 
         return run_details
 
     finally:
         printer.cleanup()
 
 if __name__ == '__main__':
     exit_code = main(sys.argv[1:], sys.stdout, sys.stderr)
     sys.exit(exit_code)