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

tests/standalone/src/StatusFileParserTest.dart

 // Copyright (c) 2011, 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.
 
 #library("StatusFileParserTest");
 
+#import("dart:io");
 #import("../../../tools/testing/dart/status_file_parser.dart");
 
 
 void main() {
   TestReadStatusFile("tests/co19/co19-compiler.status");
   TestReadStatusFile("tests/co19/co19-runtime.status");
   TestReadStatusFile("tests/corelib/corelib.status");
   TestReadStatusFile("tests/isolate/isolate.status");
   TestReadStatusFile("tests/language/language.status");
   TestReadStatusFile("tests/standalone/standalone.status");
   TestReadStatusFile("tests/stub-generator/stub-generator.status");
   TestReadStatusFile("samples/tests/samples/samples.status");
   TestReadStatusFile("runtime/tests/vm/vm.status");
   TestReadStatusFile("frog/tests/frog/frog.status");
   TestReadStatusFile("compiler/tests/dartc/dartc.status");
   TestReadStatusFile("client/tests/client/client.status");
   TestReadStatusFile("client/tests/dartc/dartc.status");
 }
 
 
 void TestReadStatusFile(String filePath) {
   File file = new File(getFilename(filePath));
   if (file.existsSync()) {
     List<Section> sections = new List<Section>();
     ReadConfigurationInto(filePath, sections, () {
         Expect.isTrue(sections.length > 0);
       });
   }
 }