title: Cefsharp, how can i modify the response data when load Url
body: <p>when I load a url by cef,  the browser will get many html/js/css/pictures, 
  I want to modify the htmlsource,  or replace the pic/css, or modify some functions of the js.<br>
  and I have try the IResponseFilter ,it can capture the response data, but it can't modify them . 
  I found the SchemeHandlers and IResourceHandler maybe ok, but there isn't a good example about how to work well . So  how can I modify them before they show? ?  Thanks in advance!</p>