Roll to pickup pool changes

packages/barback/lib/src/utils/file_pool.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.utils.file_pool;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 16 matching lines @@
   /// substantial additional throughput.
   final Pool _pool = new Pool(32, timeout: new Duration(seconds: 60));
 
   /// Opens the file at [path] for reading.
   ///
   /// When the returned stream is listened to, if there are too many files
   /// open, this will wait for a previously opened file to be closed and then
   /// try again.
   Stream<List<int>> openRead(String path) {
     return futureStream(_pool.request().then((resource) {
-      return new File(path).openRead().transform(
-          new StreamTransformer.fromHandlers(handleDone: (sink) {
+      return new File(path)
+          .openRead()
+          .transform(new StreamTransformer.fromHandlers(handleDone: (sink) {
         sink.close();
         resource.release();
       }));
     }));
   }
 
   /// Reads [path] as a string using [encoding].
   ///
   /// If there are too many files open and the read fails, this will wait for
   /// a previously opened file to be closed and then try again.
   Future<String> readAsString(String path, Encoding encoding) {
     return _readAsBytes(path).then(encoding.decode);
   }
 
   /// Reads [path] as a list of bytes, using [openRead] to retry if there are
   /// failures.
   Future<List<int>> _readAsBytes(String path) {
     var completer = new Completer<List<int>>();
     var builder = new BytesBuilder();
 
     openRead(path).listen(builder.add, onDone: () {
       completer.complete(builder.takeBytes());
     }, onError: completer.completeError, cancelOnError: true);
 
     return completer.future;
   }
 }