title: Switch current tab from notification in Google Chrome extension
body: <p>Am I missing something in the Chrome <a href="http://code.google.com/chrome/extensions/tabs.html" rel="noreferrer">tabs documentation</a> or is there a way for an extension to change the currently active tab?</p>
  
  <p>I have an extension which, once the tab has finished loading, pops up a notification and, if the loaded tab is not selected, offers the user the change to change it to selected. Or at least that's what I want it to do.</p>
  
  <p>Reading the <a href="http://code.google.com/chrome/extensions/notifications.html" rel="noreferrer">notifications API</a> I don't see any mention of a way of accessing <code>chrome.tabs.get</code>, but there is <code>chrome.extension.getBackgroundPage()</code>. Anyone have any idea on how to turn that into what I'm looking to do?</p>
  
  <p>Many thanks in advance.</p>