我安装了Exe File（Chromedriver_win_23.0.1240.0.zip），来自：http：//code.google.com/p/p/chromedriver/chromedriver/downloads/list
尝试使用Alister Scott的示例设置配置文件
profile = Selenium::WebDriver::Chrome::Profile.new
profile['download.prompt_for_download'] = false
profile['download.default_directory'] = "/path/to/dir"
b = Watir::Browser.new :chrome, :profile => profile