Remove utils/archive. It is not used at this point.

utils/archive/utils.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.
-
-library utils;
-
-import 'dart-ext:dart_archive';
-import 'dart:isolate';
-import 'archive.dart' as archive;
-
-/** The cache of the port used to communicate with the C extension. */
-SendPort _port;
-
-/** The port used to communicate with the C extension. */
-SendPort get servicePort {
-  if (_port == null) _port = _newServicePort();
-  return _port;
-}
-
-/** Creates a new port to communicate with the C extension. */
-SendPort _newServicePort() native "Archive_ServicePort";
-
-/**
- * Send a message to the C extension.
- *
- * [requestType] is the specific request id to send. [id] is the id of the
- * archive; it may be null for requests that don't operate on a specific
- * archive. [args] are arguments that will be passed on to the extension. They
- * should all be C-safe.
- *
- * Returns a future that completes with the C extension's reply.
- */
-Future call(int requestType, [int id, List args]) {
-  var fullArgs = [requestType, id];
-  if (args != null) fullArgs.addAll(args);
-  return servicePort.call(listForC(fullArgs)).then((response) {
-    var success = response[0];
-    var errno = response[1];
-    var message = response[2];
-
-    if (!success) throw new ArchiveException(message, errno);
-    return message;
-  });
-}
-
-/** Converts [input] to a fixed-length list which C can understand. */
-List listForC(List input) {
-  var list = new List.fixedLength(input.length);
-  list.setRange(0, input.length, input);
-  return list;
-}
-
-/** Converts [input] to a [Uint8List] that C can process easily. */
-Uint8List bytesForC(List<int> input) {
-  var list = new Uint8List(input.length);
-  list.setRange(0, input.length, input);
-  return list;
-}
-
-/**
- * Attaches [callback] as a finalizer for [object]. After [object] has been
- * garbage collected, [callback] will be called and passed [peer] as an
- * argument.
- *
- * Neither [callback] nor [peer] should contain any references to [object];
- * otherwise, [object] will never be collected and [callback] will never be
- * called.
- */
-void attachFinalizer(object, void callback(peer), [peer]) {}
-
-// TODO(nweiz): re-enable this once issue 4378 is fixed.
-// void attachFinalizer(object, void callback(peer), [peer])
-//     native "Archive_AttachFinalizer";
-
-/**
- * A reference to a single value.
- *
- * This is primarily meant to be used when a finalizer needs to refer to a field
- * on the object being finalized that may be set to null during the lifetime of
- * the object. Since the object itself has been garbage collected once the
- * finalizer runs, it needs a second-order reference to check if the field is
- * null.
- */
-class Reference<E> {
-  E value;
-  Reference(this.value);
-}
-
-/**
- * Returns a [Future] that completes immediately upon hitting the event loop.
- */
-Future async() {
-  var completer = new Completer();
-  new Timer(0, (_) => completer.complete(null));
-  return completer.future;
-}
-
-/** An error raised by the archive library. */
-class ArchiveException implements archive.ArchiveException {
-  /** A description of the error that occurred. */   
-  final String message;
-
-  /** The error code for the error, or null. */
-  final int errno;
-
-  ArchiveException(this.message, [this.errno]);
-
-  String toString() {
-    if (errno == null) return "Archive error: $message";
-    return "Archive error $errno: $message";
-  }
-}