title: Restoring chrome new-tab w/o uninstalling my extension
body: <p>I have a chrome extension whick among other things is replacing the new-tab functionallity.
  But since i can't restore all the new-tab functionallity (account sync login,bookmarks,web apps,recent sites,most popular).
  I want the users to be able to restore the default new tab, w/o uninstalling my extension.</p>
  
  <p>From my investigation there is the internal chrome scheme: "<strong>chrome-internal://</strong>" whick has the URL : <strong>chrome-internal://new-tab/</strong> .
  When i try to navigate to it from my extension it does not seem to work (premission denied,although i requested it within the mainfest).
  But when navigating to it from chrome (js console) it does show the default new tab.</p>
  
  <p>Any help will be appreciated.</p>