Roll to pickup pool changes

packages/barback/lib/src/graph/asset_cascade.dart

 // Copyright (c) 2013, 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 barback.graph.asset_cascade;
 
 import 'dart:async';
 
 import 'package:async/async.dart';
 
@@ skipping 179 matching lines @@
       _addPhase(phase);
       phase.updateTransformers(transformers[i]);
     }
 
     for (var i = transformers.length + 1; i < _phases.length; i++) {
       _phases[i].remove();
     }
     _phases.removeRange(transformers.length + 1, _phases.length);
 
     _phaseStatusSubscription.cancel();
-    _phaseStatusSubscription = _phases.last.onStatusChange
-        .listen(_streams.changeStatus);
+    _phaseStatusSubscription =
+        _phases.last.onStatusChange.listen(_streams.changeStatus);
 
     _streams.onAssetPool.add(_phases.last.onAsset);
   }
 
   /// Force all [LazyTransformer]s' transforms in this cascade to begin
   /// producing concrete assets.
   void forceAllTransforms() {
     for (var phase in _phases) {
       phase.forceAllTransforms();
     }
   }
 
   void reportError(BarbackException error) {
     _errorsController.add(error);
   }
 
   /// Add [phase] to the end of [_phases] and watch its streams.
   void _addPhase(Phase phase) {
     _streams.onLogPool.add(phase.onLog);
     if (_phaseStatusSubscription != null) _phaseStatusSubscription.cancel();
     _phaseStatusSubscription =
         phase.onStatusChange.listen(_streams.changeStatus);
 
     _phases.add(phase);
   }
 
   String toString() => "cascade for $package";
 }