Clean up run-blink-httpd, run-blink-websocketserver, add tests.

Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py

 # Copyright (c) 2012 Google 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.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 86 matching lines @@
             cmd_line = original_cmd_line(pixel_tests, per_test_args)
             index = cmd_line.index(driver_path)
             cmd_line[index:index + 1] = [python_exe, this_file, '--platform', port_name]
             return cmd_line
 
         return new_cmd_line
 
     def start_helper(self):
         pass
 
-    def start_http_server(self, number_of_servers):
+    def start_http_server(self, additional_dirs, number_of_servers):
         pass
 
     def start_websocket_server(self):
         pass
 
     def acquire_http_lock(self):
         pass
 
     def stop_helper(self):
         pass
@@ skipping 159 matching lines @@
         self._stdout.write('#EOF\n')
         self._stdout.flush()
         self._stderr.write('#EOF\n')
         self._stderr.flush()
 
 
 if __name__ == '__main__':
     # Note that the Mock in MockDRT refers to the fact that it is emulating a
     # real DRT, and as such, it needs access to a real SystemHost, not a MockSystemHost.
     sys.exit(main(sys.argv[1:], SystemHost(), sys.stdin, sys.stdout, sys.stderr))