Split File into File and RandomAccessFile.

tools/testing/dart/test_suite.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("test_suite");
 
 #import("status_file_parser.dart");
 #import("test_runner.dart");
 #import("multitest.dart");
 
@@ skipping 305 matching lines @@
   Map optionsFromFile(String filename) {
     RegExp testOptionsRegExp = const RegExp(@"// VMOptions=(.*)");
     RegExp dartOptionsRegExp = const RegExp(@"// DartOptions=(.*)");
     RegExp multiTestRegExp = const RegExp(@"/// [0-9][0-9]:(.*)");
     RegExp leadingHashRegExp = const RegExp(@"^#", multiLine: true);
     RegExp isolateStubsRegExp = const RegExp(@"// IsolateStubs=(.*)");
 
     // Read the entire file into a byte buffer and transform it to a
     // String. This will treat the file as ascii but the only parts
     // we are interested in will be ascii in any case.
-    File file = new File(filename);
-    file.openSync();
+    RandomAccessFile file = (new File(filename)).openSync();
     List chars = new List(file.lengthSync());
     var offset = 0;
     while (offset != chars.length) {
       offset += file.readListSync(chars, offset, chars.length - offset);
     }
     file.closeSync();
     String contents = new String.fromCharCodes(chars);
     chars = null;
 
     // Find the options in the file.
@@ skipping 204 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout\
 """;
     print(report);
   }
 }