Revert the revert.

tests/html/xhr_cross_origin_test.dart

 // Copyright (c) 2012, 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 XHRCrossOriginTest;
 import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
+import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:json' as json;
 
 /**
  * Examine the value of "crossOriginPort" as passed in from the url from
  * [window.location] to determine what the cross-origin port is for
  * this test.
  */
  // TODO(efortuna): If we need to use this function frequently, make a
  // url_analyzer library that is part of test.dart that these tests can import.
 int get crossOriginPort {
   var searchUrl = window.location.search;
   var crossOriginStr = 'crossOriginPort=';
   var index = searchUrl.indexOf(crossOriginStr);
   var nextArg = searchUrl.indexOf('&', index);
   return int.parse(searchUrl.substring(index + crossOriginStr.length,
       nextArg == -1 ? searchUrl.length : nextArg));
 }
 
 main() {
-  useHtmlConfiguration();
+  useHtmlIndividualConfiguration();
 
-  var port = crossOriginPort;
-  var host = '${window.location.protocol}//${window.location.hostname}:$port';
+  group('supported', () {
+    test('supported', () {
+      expect(HttpRequest.supportsCrossOrigin, isTrue);
+    });
+  });
 
-  test('XHR Cross-domain', () {
-    var url =  '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
-    var xhr = new HttpRequest();
-    xhr.open('GET', url, async: true);
-    var validate = expectAsync1((data) {
-      expect(data, contains('feed'));
-      expect(data['feed'], contains('entry'));
-      expect(data, isMap);
-    });
-    xhr.onReadyStateChange.listen((e) {
-      guardAsync(() {
-        if (xhr.readyState == HttpRequest.DONE) {
-          validate(json.parse(xhr.response));
-        }
+  group('functional', () {
+
+    var port = crossOriginPort;
+    var host = '${window.location.protocol}//${window.location.hostname}:$port';
+
+    test('XHR.get Cross-domain', () {
+      var gotError = false;
+      var url = '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
+      return HttpRequest.request(url).then((xhr) {
+        var data = json.parse(xhr.response);
+        expect(data, contains('feed'));
+        expect(data['feed'], contains('entry'));
+        expect(data, isMap);
+      }).catchError((error) {}, test: (error) {
+        gotError = true;
+        // Consume errors when not supporting cross origin.
+        return !HttpRequest.supportsCrossOrigin;
+      }).whenComplete(() {
+        // Expect that we got an error when cross origin is not supported.
+        expect(gotError, !HttpRequest.supportsCrossOrigin);
       });
     });
-    xhr.send();
-  });
 
-  test('XHR.get Cross-domain', () {
-    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'));
-      expect(data['feed'], contains('entry'));
-      expect(data, isMap);
-    }));
-  });
+    // Skip the rest if not supported.
+    if (!HttpRequest.supportsCrossOrigin) {
+      return;
+    }
 
-  test('XHR.getWithCredentials Cross-domain', () {
-    var url = '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
-    HttpRequest.request(url, withCredentials: true).then(expectAsync1((xhr) {
-      var data = json.parse(xhr.response);
-      expect(data, contains('feed'));
-      expect(data['feed'], contains('entry'));
-      expect(data, isMap);
-    }));
+    test('XHR Cross-domain', () {
+      var url =  '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
+      var xhr = new HttpRequest();
+      xhr.open('GET', url, async: true);
+      var validate = expectAsync1((data) {
+        expect(data, contains('feed'));
+        expect(data['feed'], contains('entry'));
+        expect(data, isMap);
+      });
+      xhr.onReadyStateChange.listen((e) {
+        guardAsync(() {
+          if (xhr.readyState == HttpRequest.DONE) {
+            validate(json.parse(xhr.response));
+          }
+        });
+      });
+      xhr.send();
+    });
+
+    test('XHR.getWithCredentials Cross-domain', () {
+      var url = '$host/root_dart/tests/html/xhr_cross_origin_data.txt';
+      return HttpRequest.request(url, withCredentials: true).then((xhr) {
+        var data = json.parse(xhr.response);
+        expect(data, contains('feed'));
+        expect(data['feed'], contains('entry'));
+        expect(data, isMap);
+      });
+    });
   });
 }