title: How do I call SignalR in a chrome extension background page for specific host?
body: <p>I'm trying to use SignalR in a chrome extension on a background page.</p>
  
  <p>Everything seems to work fine until it tries to call negotiate.  It seems to be taking the caller (which is a chrome-extension background page) and trying to call negotiate against that, which gives me a 404 while trying to call this page:</p>
  
  <p><code>chrome-extension://edcdcfjmmmchhgmomfemdkomibeoloko/signalr/negotiate?_=1372007788595</code></p>
  
  <p>I'd imagine that it should be calling</p>
  
  <p><code>https://myserver.com/signalr/negotiate?_=1372007788595</code></p>
  
  <p>But I don't know how to override SignalR with a specific host.  Can I override SignalR to work in a chrome extension on a background page</p>