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

tests/standalone/src/FileInputStreamTest.dart

Index: tests/standalone/src/FileInputStreamTest.dart
diff --git a/tests/standalone/src/FileInputStreamTest.dart b/tests/standalone/src/FileInputStreamTest.dart
index 0f71a4c8239d0c47499d6353a5caf39573c7194c..01fd9bcc5497c3d581970dca90b04ad13b24938c 100644
--- a/tests/standalone/src/FileInputStreamTest.dart
+++ b/tests/standalone/src/FileInputStreamTest.dart
@@ -1,8 +1,10 @@
-// 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.
 // Testing file input stream, VM-only, standalone test.
 
+#import("dart:io");
+
 // Helper method to be able to run the test from the runtime
 // directory, or the top directory.
 String getFilename(String path) =>