gistfile1.txt

Map<String, Object> contentSettings = new HashMap<String, Object>();

contentSettings.put("images", 2);
contentSettings.put("plugins", 2);
contentSettings.put("popups", 2);
contentSettings.put("audio", 2);

Map<String, Object> preferences = new HashMap<String, Object>();
preferences.put("profile.default_content_settings", contentSettings);

DesiredCapabilities caps = DesiredCapabilities.chrome();
caps.setCapability("chrome.prefs", preferences);

driver = new RemoteWebDriver(service.getUrl(), caps);