Roll to pickup pool changes

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

Index: packages/barback/lib/src/transformer/declaring_transform.dart
diff --git a/packages/barback/lib/src/transformer/declaring_transform.dart b/packages/barback/lib/src/transformer/declaring_transform.dart
index 7dff33a83d51f74dec2f4608ba4b25b9ae3dc97e..7ace38e1c12506c470e513d6631645bc5fa609dd 100644
--- a/packages/barback/lib/src/transformer/declaring_transform.dart
+++ b/packages/barback/lib/src/transformer/declaring_transform.dart
@@ -26,8 +26,8 @@ Future<DeclaringTransform> newDeclaringTransform(
   // 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