Remove old #import, #source, and #library syntax from tests/standalone.

tests/standalone/io/http_server_socket_test.dart

Index: tests/standalone/io/http_server_socket_test.dart
diff --git a/tests/standalone/io/http_server_socket_test.dart b/tests/standalone/io/http_server_socket_test.dart
index 24c97127fd999fa55203d36d5438631098c5a09a..6a71fd808b9b148ff9c72e3928e4c306ad5cc209 100644
--- a/tests/standalone/io/http_server_socket_test.dart
+++ b/tests/standalone/io/http_server_socket_test.dart
@@ -2,9 +2,9 @@
 // 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.
 
-#import("dart:io");
-#import("dart:isolate");
-#import("dart:math");
+import "dart:io";
+import "dart:isolate";
+import "dart:math";
 
 class ExpectedDataOutputStream implements OutputStream {
   ExpectedDataOutputStream(List<int> this._data,