def __init__(self, host, port_name, **kwargs):
        ApplePort.__init__(self, host, port_name, **kwargs)

        self._leak_detector = LeakDetector(self)
        if self.get_option("leaks"):
            # DumpRenderTree slows down noticably if we run more than about 1000 tests in a batch
            # with MallocStackLogging enabled.
            self.set_option_default("batch_size", 1000)

    def _build_path(self, *comps):
        """Returns the full path to the test driver (DumpRenderTree)."""
        root_directory = self.get_option('root')
        if not root_directory:
            ApplePort._build_path(self, *comps)
            root_directory = self._filesystem.join(self.get_option('root'), "bin32")
            self.set_option('root', root_directory)

        return self._filesystem.join(self._filesystem.abspath(root_directory), *comps)

    def _build_path(self, *comps):
        """Returns the full path to the test driver (DumpRenderTree)."""
        root_directory = self.get_option('_cached_root') or self.get_option('root')
        if not root_directory:
            ApplePort._build_path(self, *comps)  # Sets option _cached_root
            binary_directory = 'bin32'
            if self.get_option('architecture') == 'x86_64':
                binary_directory = 'bin64'
            root_directory = self._filesystem.join(self.get_option('_cached_root'), binary_directory)
            self.set_option('_cached_root', root_directory)

        return self._filesystem.join(root_directory, *comps)

    def do_text_results_differ(self, expected_text, actual_text):
        # Sanity was restored in WK2, so we don't need this hack there.
        if self.get_option('webkit_test_runner'):
            return ApplePort.do_text_results_differ(self, expected_text, actual_text)

        # This is a hack (which dates back to ORWT).
        # Windows does not have an EDITING DELEGATE, so we strip any EDITING DELEGATE
        # messages to make more of the tests pass.
        # It's possible more of the ports might want this and this could move down into WebKitPort.
        delegate_regexp = re.compile("^EDITING DELEGATE: .*?\n", re.MULTILINE)
        expected_text = delegate_regexp.sub("", expected_text)
        actual_text = delegate_regexp.sub("", actual_text)
        return expected_text != actual_text

    def __init__(self, host, port_name, **kwargs):
        ApplePort.__init__(self, host, port_name, **kwargs)

        self._abs_results_directory = None