Roll to pickup pool changes

packages/barback/lib/src/transformer/declaring_transform.dart

 // Copyright (c) 2014, 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.transformer.declaring_transform;
 
 import 'dart:async';
 
 import '../asset/asset_id.dart';
 import 'declaring_aggregate_transform.dart';
 import 'transform_logger.dart';
 
 /// Creates a new [DeclaringTransform] wrapping an
 /// [AggregateDeclaringTransform].
 ///
 /// Although barback internally works in terms of
 /// [DeclaringAggregateTransformer]s, most transformers only work on individual
 /// primary inputs in isolation. We want to allow those transformers to
 /// implement the more user-friendly [DeclaringTransformer] interface which
 /// takes the more user-friendly [DeclaringTransform] object. This method wraps
 /// the more general [DeclaringAggregateTransform] to return a
 /// [DeclaringTransform] instead.
 Future<DeclaringTransform> newDeclaringTransform(
     DeclaringAggregateTransform aggregate) {
   // A wrapped [Transformer] will assign each primary input a unique transform
   // key, so we can safely get the first asset emitted. We don't want to wait
   // for the stream to close, since that requires barback to prove that no more
   // new assets will be generated.
-  return aggregate.primaryIds.first.then((primaryId) => 
-      new DeclaringTransform._(aggregate, primaryId));
+  return aggregate.primaryIds.first
+      .then((primaryId) => new DeclaringTransform._(aggregate, primaryId));
 }
 
 /// A transform for [DeclaringTransformer]s that allows them to declare the ids
 /// of the outputs they'll generate without generating the concrete bodies of
 /// those outputs.
 class DeclaringTransform {
   /// The underlying aggregate transform.
   final DeclaringAggregateTransform _aggregate;
 
   final AssetId primaryId;
@@ skipping 14 matching lines @@
 
   /// Consume the primary input so that it doesn't get processed by future
   /// phases or emitted once processing has finished.
   ///
   /// Normally the primary input will automatically be forwarded unless the
   /// transformer overwrites it by emitting an input with the same id. This
   /// allows the transformer to tell barback not to forward the primary input
   /// even if it's not overwritten.
   void consumePrimary() => _aggregate.consumePrimary(primaryId);
 }