Intermediary fixes to get some bots green.

tests/html/xhr_test.dart

Index: tests/html/xhr_test.dart
diff --git a/tests/html/xhr_test.dart b/tests/html/xhr_test.dart
index 288f068f6d46046f461357643e869bc55c655c90..4988b1bd625e5ddf37c7cf6e5703ff14e485f591 100644
--- a/tests/html/xhr_test.dart
+++ b/tests/html/xhr_test.dart
@@ -48,10 +48,10 @@ main() {
   });
 
   test('XHR.get file', () {
-    var xhr = new HttpRequest.get(url, expectAsync1((xhr) {
-      expect(xhr.readyState, equals(HttpRequest.DONE));
-      expect(xhr.status, equals(200));
-      var data = JSON.parse(xhr.response);
+    var xhr = new HttpRequest.get(url, expectAsync1((event) {
+      expect(event.readyState, equals(HttpRequest.DONE));
+      expect(event.status, equals(200));
+      var data = JSON.parse(event.response);
       expect(data, contains('feed'));
       expect(data['feed'], contains('entry'));
       expect(data, isMap);