title: chrome api: delete omnibox history
body: <p>I just write my first chrome extension and I try to delete the omnibox history, but it doesn't work.</p>
  
  <p>I use "chrome.history.deleteAll(function(){})" to delete the whole browser history, but there are still old search queries in the omnibox. Is there any other function I have to call?</p>
  
  <p>Regards,
    Simon.</p>
  
  <p>Edit: So, I disabled the browser synchronization and used the "browsingData" module, but I still have the same problem. I can't delete all queries and URLs in the omnibox. If I use Ctrl+Shift+Del everything works. Why I don't have the same possibilities with this chrome api?...</p>