Change new List(n) to return fixed length list.

tests/standalone/io/file_invalid_arguments_test.dart

 // 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";
 import "dart:isolate";
 
 void testReadInvalidArgs(arg) {
   var port = new ReceivePort();
   String filename = getFilename("tests/vm/data/fixed_length_file");
@@ skipping 126 matching lines @@
   file.close();
 }
 
 String getFilename(String path) {
   return new File(path).existsSync() ? path : 'runtime/$path';
 }
 
 main() {
   testReadInvalidArgs('asdf');
   testReadListInvalidArgs(12, 0, 1);
-  testReadListInvalidArgs(new List.fixedLength(10), '0', 1);
-  testReadListInvalidArgs(new List.fixedLength(10), 0, '1');
+  testReadListInvalidArgs(new List(10), '0', 1);
+  testReadListInvalidArgs(new List(10), 0, '1');
   testWriteByteInvalidArgs('asdf');
   testWriteListInvalidArgs(12, 0, 1);
-  testWriteListInvalidArgs(new List.fixedLength(10), '0', 1);
-  testWriteListInvalidArgs(new List.fixedLength(10), 0, '1');
+  testWriteListInvalidArgs(new List(10), '0', 1);
+  testWriteListInvalidArgs(new List(10), 0, '1');
 }