Google Maps API - Autocomplete Predictions for USA only

I'm using Google Maps API example called 'Retrieving Autocomplete Predictions'. And I can't figure out how to filter it so it only returns places in the USA. I see how I could do it with the other examples...

var input = document.getElementById('searchTextField');
var options = {
      types: ['(cities)'],
      componentRestrictions: {country: 'us'}
    };

autocomplete = new google.maps.places.Autocomplete(input, options);

But I can't seem to figure out how to apply it to my example. Here is my code...

function GetAddressPredictions(Search) {
    var displaySuggestions = function (predictions, status) {
    if (status != google.maps.places.PlacesServiceStatus.OK) {
        return;
    }
    predictions.forEach(function (prediction) {
        PredictionArray.push(prediction);
    });
};
var service = new google.maps.places.AutocompleteService();
service.getQueryPredictions({input: Search}, displaySuggestions);
}

I tried this but it didn't work.

function GetAddressPredictions(Search) {
    var displaySuggestions = function (predictions, status) {
    if (status != google.maps.places.PlacesServiceStatus.OK) {
        return;
    }
    predictions.forEach(function (prediction) {
        PredictionArray.push(prediction);
    });
};
var options = {
    types: ['(cities)'],
    componentRestrictions: {country: 'us'}
      };
    var service = new google.maps.places.AutocompleteService();
    service.getQueryPredictions({input: Search, options}, displaySuggestions);
}

Any Ideas? Thanks.