Adding Angular and dependent packages for testing

third_party/pkg/js/example/google-maps/directions.dart

Index: third_party/pkg/js/example/google-maps/directions.dart
diff --git a/third_party/pkg/js/example/google-maps/directions.dart b/third_party/pkg/js/example/google-maps/directions.dart
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+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// A JS Interop sample accessing the Google Maps API.  The sample is based on
+// the directions-panel example here:
+// https://google-developers.appspot.com/maps/documentation/javascript/examples/directions-panel
+
+import 'dart:html';
+import 'package:js/js.dart' as js;
+
+// Save the JS google.maps namespace for convenience.
+final maps = js.context.google.maps;
+
+var directionsDisplay;
+var directionsService;
+
+void main() {
+
+  // Allocate a new JS Map with the following options.  See:
+  // https://developers.google.com/maps/documentation/javascript/reference#Map
+  var myOptions = js.map({
+    'zoom': 9,
+    'mapTypeId': maps.MapTypeId.ROADMAP,
+    'center': new js.Proxy(maps.LatLng, 47.6097, -122.3331)
+  });
+
+  var map = new js.Proxy(maps.Map, querySelector('#map_canvas'), myOptions);
+
+  // Allocate a new JS DirectionsRenderer to display directions on the page.
+  // See
+  // https://developers.google.com/maps/documentation/javascript/reference#DirectionsRenderer
+  directionsDisplay = new js.Proxy(maps.DirectionsRenderer,
+      js.map({'map': map}));
+  directionsDisplay.setPanel(querySelector('#directions_panel'));
+
+  // Allocate a new JS DirectionService to forward requests to the server.
+  // See:
+  // https://developers.google.com/maps/documentation/javascript/reference#DirectionsService
+  directionsService = new js.Proxy(maps.DirectionsService);
+
+  var control = querySelector('#control');
+  control.style.display = 'block';
+  map.controls[maps.ControlPosition.TOP].push(control);
+
+  // Recalculate the route when the start or end points are changed.
+  querySelector('#start').onChange.listen(calcRoute);
+  querySelector('#end').onChange.listen(calcRoute);
+}
+
+void calcRoute(e) {
+  final panel = querySelector('#directions_panel');
+  final SelectElement start = querySelector('#start');
+  final SelectElement end = querySelector('#end');
+
+  panel.innerHtml = "<b>Thinking...</b>";
+
+  // Submit a new directions request.
+  final request = js.map({
+    'origin': start.value,
+    'destination': end.value,
+    'travelMode': maps.DirectionsTravelMode.DRIVING
+  });
+
+  directionsService.route(request, (response, status) {
+    if (status == maps.DirectionsStatus.OK) {
+      querySelector('#directions_panel').innerHtml = "";
+      directionsDisplay.setDirections(response);
+    } else {
+      querySelector('#directions_panel').innerHtml = "<b>Err, try flying.</b>";
+    }
+  });
+}