Split dart:builtin into dart:builtin and dart:io.

tests/standalone/src/TimerRepeatTest.dart

Index: tests/standalone/src/TimerRepeatTest.dart
diff --git a/tests/standalone/src/TimerRepeatTest.dart b/tests/standalone/src/TimerRepeatTest.dart
index 4211c55e4c37c97bf4f5a1c88b64110ea1bc7597..748e528b5a6addf624ed8e55273937750ddb0e4c 100644
--- a/tests/standalone/src/TimerRepeatTest.dart
+++ b/tests/standalone/src/TimerRepeatTest.dart
@@ -1,7 +1,9 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
+#import("dart:io");
+
 class TimerRepeatTest {
 
   static final int _TIMEOUT = 500;