port TemplateBinding to ed3266266e751b5ab1f75f8e0509d0d5f0ef35d8

pkg/polymer_expressions/test/bindings_test.dart

 // Copyright (c) 2013, 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.
 
 library bindings_test;
 
 import 'dart:html';
 
 import 'package:logging/logging.dart';
 import 'package:observe/observe.dart';
@@ skipping 19 matching lines @@
       testDiv.remove();
       testDiv = null;
       stop.cancel();
       stop = null;
       messages = [];
     });
 
     observeTest('should update binding when data changes', () {
       var model = new NotifyModel();
       var binding = new PolymerExpressions()
-          .getBinding(model, 'x', null, null);
+          .prepareBinding('x', null, null)(model, null);
       expect(binding.value, isNull);
       model.x = "hi";
       performMicrotaskCheckpoint();
       expect(binding.value, 'hi');
       expect(messages.length, 0);
     });
 
     observeTest('should update text content when data changes', () {
       var model = new NotifyModel('abcde');
       var template = templateBind(new Element.html(
@@ skipping 72 matching lines @@
   var _x;
   NotifyModel([this._x]);
 
   get x => _x;
   set x(value) {
     _x = notifyPropertyChange(#x, _x, value);
   }
 }
 
 observeTest(name, testCase) => test(name, wrapMicrotask(testCase));