title: How do I programatically control a Chrome instance from the command line?
body: <p>How do I control a running Google Chrome instance from the command line?  I'm hoping there's something like a <code>-remote</code> flag that will allow me to send in some javascript or somesuch.  In particular, I would like to reload the topmost document on the foremost window.</p>
  
  <p>I'm especially interested in Linux/MacOS solutions.</p>