   _frameEl.className = "vimiumReset vimiumHighlightedFrame"
   _shadowDOM.appendChild _frameEl
 
-  (request) ->
+  window.focusThisFrame = (request) ->
     if window.innerWidth < 3 or window.innerHeight < 3
       # This frame is too small to focus. Cancel and tell the background frame to focus the next one instead.
       # This affects sites like Google Inbox, which have many tiny iframes. See #1317.

#
# Called from the backend in order to change frame focus.
#
window.focusThisFrame = do ->
  # Create a shadow DOM wrapping the frame so the page's styles don't interfere with ours.
  highlightedFrameElement = DomUtils.createElement "div"
  # PhantomJS doesn't support createShadowRoot, so guard against its non-existance.

    if shouldHighlight
      document.documentElement.appendChild highlightedFrameElement
      setTimeout (-> highlightedFrameElement.remove()), 200
), 0

extend window,
  scrollToBottom: ->
