function updateUIFromGet(settings) {
  if (settings) {
    console.log('pref.get result:' + JSON.stringify(settings));
    updateUI(settings);
  }
}
Wrapper for |updateUI| which is used as callback for the |get()| method and
which logs the result.
If there was an error getting the preference, does nothing.

@param settings{object} A settings object, as returned from |get()|.