Rename unsubscribeOnError to cancelOnError.

utils/pub/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.
 
 /// Generic utility functions. Stuff that should possibly be in core.
 library utils;
 
 import 'dart:async';
 import 'dart:crypto';
 import 'dart:isolate';
@@ skipping 154 matching lines @@
 Future streamFirst(Stream stream) {
   var completer = new Completer();
   var subscription;
   subscription = stream.listen((value) {
     subscription.cancel();
     completer.complete(value);
   }, onError: (e) {
     completer.completeError(e.error, e.stackTrace);
   }, onDone: () {
     completer.completeError(new StateError("No elements"));
-  }, unsubscribeOnError: true);
+  }, cancelOnError: true);
   return completer.future;
 }
 
 /// Returns a wrapped version of [stream] along with a [StreamSubscription] that
 /// can be used to control the wrapped stream.
 Pair<Stream, StreamSubscription> streamWithSubscription(Stream stream) {
   var controller = stream.isBroadcast ?
       new StreamController.broadcast() :
       new StreamController();
   var subscription = stream.listen(controller.add,
@@ skipping 164 matching lines @@
         .then((resolved) => new Pair(key, resolved)));
   });
   return Future.wait(pairs).then((resolvedPairs) {
     var map = {};
     for (var pair in resolvedPairs) {
       map[pair.first] = pair.last;
     }
     return map;
   });
 }