anchor.diff:  import 'package:chrome_gen/chrome_app.dart' as chrome_gen;
   
   import 'lib/ace.dart';
  +import 'lib/analytics.dart' as analytics;
   import 'lib/app.dart';
   import 'lib/utils.dart';
   import 'lib/preferences.dart';
  
positive.code: }
  
  class Spark extends Application implements FilesControllerDelegate {
    AceEditor editor;
    Workspace workspace;
  
    PreferenceStore localPrefs;
    PreferenceStore syncPrefs;
  
negative.code: 
      localPrefs = PreferenceStore.createLocal();
      syncPrefs = PreferenceStore.createSync();
  
      analytics.getService('Spark').then((service) {
        // Init the analytics tracker with our application ID.
        tracker = service.getTracker(_ANALYTICS_ID);
  
        // Send a page view for the main app page.
        tracker.sendAppView('/');
      });
  
      addParticipant(new _SparkSetupParticipant(this));
  
  