I\'m using Chrome Web Driver 2.10 chromedriver_win32.zip with Selenium WebDriver 2.31.2.
With verbose logging enabled it seems the DesiredCapabilities
ChromeOptions options = new ChromeOptions();
Map prefs = new HashMap();
prefs.put("profile.default_content_settings.popups", 0);
prefs.put("download.default_directory", getClass().getResource("/data/input").toString().replace("%20", " ").replace("file:","").replaceFirst("/", ""));
options.setExperimentalOption("prefs", prefs);
options.addArguments("--test-type");
capabilities.setCapability(ChromeOptions.CAPABILITY, options);