title: chrome.tabs.create is giving an error - "Uncaught TypeError: Cannot call method 'create' of undefined"
body: <p>My manifest.json contains</p>
  
  <pre><code>"content_scripts": [
    {
    "matches": ["http://www.facebook.com/*","https://www.facebook.com/*"],
     "js": ["js/jquery-1.7.2.min.js", "js/jquery.livequery.min.js", "js/script.js"]
    }
  ]
  </code></pre>
  
  <p>and the contents of script.js are</p>
  
  <pre><code>$("#FB_HiddenContainer").livequery(function(){
     chrome.tabs.create({"url":"http://www.google.com"});
  });
  </code></pre>
  
  <p>When i open facebook, console reports an error</p>
  
  <p>Uncaught TypeError: Cannot call method 'create' of undefined</p>
  
  <p>at</p>
  
  <p><em>chrome-extension://whateveristhisweirdcode/js/script.js:2</em></p>
  
  <p><strong>How can i make it  open a new tab??</strong></p>