title: How to change already set chrome options while running tests?
body: <p>While sharing screen from webrtc application, user gets 3 options. 
  1. Share entire screen 
  2. Share specific tab 
  3. Share specific application </p>
  
  <p>I need to automate these TC's. Have found a way to do it individually on different browser driver by setting chrome option like :</p>
  
  <p>options = webdriver.ChromeOptions()
  options.add_argument("--auto-select-desktop-capture-source=Entire screen")  -- for sharing entire screen.</p>
  
  <p>But is there any way to perform all 3 cases using same driver by editing chrome option run time?</p>