Reapply expanding overloaded functions into separate functions.

tests/html/interactive_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 interactive_test;
 
 import 'dart:async';
 import 'dart:html';
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
@@ skipping 22 matching lines @@
         });
     });
   });
 
   group('MediaStream', () {
     if (MediaStream.supported) {
       test('getUserMedia', () {
         return window.navigator.getUserMedia(video: true).then((stream) {
           expect(stream,  isNotNull);
 
-          var url = Url.createObjectUrl(stream);
+          var url = Url.createObjectUrlFromStream(stream);
           expect(url,  isNotNull);
 
           var video = new VideoElement()
             ..autoplay = true;
 
           var completer = new Completer();
           video.onError.listen((e) {
             completer.completeError(e);
           });
           video.onPlaying.first.then((e) {
@@ skipping 10 matching lines @@
       test('getUserMediaComplexConstructor', () {
         return window.navigator.getUserMedia(
             video: {'mandatory':
                       { 'minAspectRatio': 1.333, 'maxAspectRatio': 1.334 },
                     'optional':
                       [{ 'minFrameRate': 60 },
                        { 'maxWidth': 640 }]
             }).then((stream) {
           expect(stream,  isNotNull);
 
-          var url = Url.createObjectUrl(stream);
+          var url = Url.createObjectUrlFromStream(stream);
           expect(url,  isNotNull);
 
           var video = new VideoElement()
             ..autoplay = true;
 
           var completer = new Completer();
           video.onError.listen((e) {
             completer.completeError(e);
           });
           video.onPlaying.first.then((e) {
@@ skipping 44 matching lines @@
           keydownHandlerTest);
       KeyboardEventStream.onKeyPress(document.body).listen(
           keypressHandlerTest);
       KeyboardEventStream.onKeyUp(document.body).listen(
           keyupHandlerTest);
       KeyboardEventStream.onKeyUp(document.body).listen(
           keyupHandlerTest2);
     });
   });
 }