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

tests/standalone/src/ProcessExitNegativeTest.dart

Index: tests/standalone/src/ProcessExitNegativeTest.dart
diff --git a/tests/standalone/src/ProcessExitNegativeTest.dart b/tests/standalone/src/ProcessExitNegativeTest.dart
index 236d175579a5b328fb0720bb4c4693b7148afb87..428e7b528cae82f1ec1be32814d9d984c5932d86 100644
--- a/tests/standalone/src/ProcessExitNegativeTest.dart
+++ b/tests/standalone/src/ProcessExitNegativeTest.dart
@@ -1,15 +1,16 @@
-// 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.
 //
 // Process test program to test that compilation errors in the process
 // exit handler is reported correctly.
 
+#import("dart:io");
 #source("ProcessTestUtil.dart");
 
 void main() {
   Process p = new Process.start(getProcessTestFileName(),
-		                        const ["0", "0", "0", "0"]);
+                                const ["0", "0", "0", "0"]);
   p.exitHandler = (int s) {
     print(a.toString());  // Should cause a compilation error here.
     p.close();