Fix a test after recent uri change.

tests/html/location_test.dart

Index: tests/html/location_test.dart
diff --git a/tests/html/location_test.dart b/tests/html/location_test.dart
index 36adf4d717c8e788bcb76f0428e4a0979183691e..d5c8e5e7c3ca3007387e293980b31f4b3fd8719a 100644
--- a/tests/html/location_test.dart
+++ b/tests/html/location_test.dart
@@ -22,7 +22,7 @@ main() {
     var origin = window.location.origin;
 
     // We build up the origin from Uri, then make sure that it matches.
-    var uri = new Uri(window.location.href);
+    var uri = Uri.parse(window.location.href);
     var reconstructedOrigin = '${uri.scheme}://${uri.host}';
     if (uri.port != 0) {
       reconstructedOrigin = '$reconstructedOrigin:${uri.port}';