title: Chrome extension API: chrome.experimental.clear.* not working?
body: <p>I made a simple extension that contains a button, that when clicked, executes the following code:</p>
  
  <pre><code>chrome.experimental.clear.cache('everything', function() {
  });
  </code></pre>
  
  <p>but the callback function never seems to get called.  Am I using this API wrong or is it just broken?</p>
  
  <p>Here's a link to the API doc for it:</p>
  
  <p><a href="http://code.google.com/chrome/extensions/experimental.clear.html#method-cache" rel="nofollow">http://code.google.com/chrome/extensions/experimental.clear.html#method-cache</a></p>
  
  <p>Thanks!</p>