text: 
  // Called when the user clicks on the browser action.
  chrome.browserAction.onClicked.addListener(function(tab) {
      // Send a message to the active tab
      chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
        var activeTab = tabs[0];
        chrome.tabs.sendMessage(activeTab.id, {"message": "clicked_browser_action"});
      });
    });