Fixing IE10 CORS test.

tests/html/xhr_cross_origin_test.dart

Index: tests/html/xhr_cross_origin_test.dart
diff --git a/tests/html/xhr_cross_origin_test.dart b/tests/html/xhr_cross_origin_test.dart
index d4dbecdc13a83f8a0165343f08a1bb31f32a238d..baa4282cd9a7bea1d70d11fbb8627bac403e6dfe 100644
--- a/tests/html/xhr_cross_origin_test.dart
+++ b/tests/html/xhr_cross_origin_test.dart
@@ -28,12 +28,13 @@ main() {
   useHtmlConfiguration();
 
   var port = crossOriginPort;
+  var host = '${window.location.protocol}//${window.location.hostname}:$port';
 
   test('XHR Cross-domain', () {
-    var url = "http://localhost:$port/"
-              "root_dart/tests/html/xhr_cross_origin_data.txt";
+    var url =  '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
     var xhr = new HttpRequest();
     xhr.open('GET', url, async: true);
+    xhr.withCredentials = true;
     var validate = expectAsync1((data) {
       expect(data, contains('feed'));
       expect(data['feed'], contains('entry'));
@@ -50,8 +51,7 @@ main() {
   });
 
   test('XHR.get Cross-domain', () {
-    var url = "http://localhost:$port/"
-              "root_dart/tests/html/xhr_cross_origin_data.txt";
+    var url = '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
     HttpRequest.request(url).then(expectAsync1((xhr) {
       var data = json.parse(xhr.response);
       expect(data, contains('feed'));
@@ -61,8 +61,7 @@ main() {
   });
 
   test('XHR.getWithCredentials Cross-domain', () {
-    var url = "http://localhost:$port/"
-              "root_dart/tests/html/xhr_cross_origin_data.txt";
+    var url = '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
     HttpRequest.request(url, withCredentials: true).then(expectAsync1((xhr) {
       var data = json.parse(xhr.response);
       expect(data, contains('feed'));