title: <webview> tag not working Chrome Packaged Extensions
body: <p>Anyone have any advice about getting  to work in Chrome Packaged Apps? I have followed everything in the tutorials, and my webview doesn't load the URL, but the container shows up. I used horrible colours on purpose so I could see the frames (sorry in advance)</p>
  
  <p>Manifest.JSON - <a href="http://pastebin.com/dkDx3qUr" rel="nofollow">http://pastebin.com/dkDx3qUr</a>
  Window.html - <a href="http://pastebin.com/RBQZ5MNG" rel="nofollow">http://pastebin.com/RBQZ5MNG</a></p>
  
  <p>Any advice you could give would be great!</p>
  
  <p>Google Chrome Version 4.0.1312.57 m</p>