chrome.switches => chromeOptions

As mentioned in http://code.google.com/p/selenium/issues/detail?id=5530 and https://sites.google.com/a/chromium.org/chromedriver/capabilities-aka-ch... , chrome.switches is no longer supported, and should be replaced by chromeOptions. The attached patch fixes this issue, ensuring that Chrome accesses the test site, and not the site that the tests are being run from.