Upgrade Observatory to Polymer 0.10.x

runtime/bin/vmservice/client/lib/src/app/chart.dart

 // Copyright (c) 2014, 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.
 
 part of app;
 
 class GoogleChart {
   static var _api;
 
   /// Get access to the JsObject containing the Google Chart API:
   /// https://developers.google.com/chart/interactive/docs/reference
   static get api {
     return _api;
   }
 
+  static Completer _completer = new Completer();
+
+  static Future get onReady => _completer.future;
+
+  static bool get ready => _completer.isCompleted;
+
   /// Load the Google Chart API. Returns a [Future] which completes
   /// when the API is loaded.
   static Future initOnce() {
-    Completer c = new Completer();
     Logger.root.info('Loading Google Charts API');
     context['google'].callMethod('load',
         ['visualization', '1', new JsObject.jsify({
           'packages': ['corechart', 'table'],
-          'callback': new JsFunction.withThis(c.complete)
+          'callback': new JsFunction.withThis(_completer.complete)
     })]);
-    return c.future.then(_initOnceOnComplete);
+    return _completer.future.then(_initOnceOnComplete);
   }
 
   static _initOnceOnComplete(_) {
     Logger.root.info('Google Charts API loaded');
     _api = context['google']['visualization'];
     assert(_api != null);
     return _api;
   }
 }
 
@@ skipping 62 matching lines @@
       options['sortAscending'] = props['ascending'];
     }
   }
 
   /// Draw this chart using [table] and the current [options].
   void draw(DataTable table) {
     var jsOptions = new JsObject.jsify(options);
     _chart.callMethod('draw', [table._table, jsOptions]);
   }
 }