Load extraRequiredLibraries from the target passed in the options

pkg/front_end/lib/src/incremental/kernel_driver.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 
 import 'package:front_end/file_system.dart';
 import 'package:front_end/src/base/api_signature.dart';
 import 'package:front_end/src/base/performace_logger.dart';
 import 'package:front_end/src/base/processed_options.dart';
@@ skipping 87 matching lines @@
         _fileAddedFn = fileAddedFn {
     _computeSalt();
 
     Future<Null> onFileAdded(Uri uri) {
       if (_fileAddedFn != null) {
         return _fileAddedFn(uri);
       }
       return new Future.value();
     }
 
-    _fsState = new FileSystemState(
-        _byteStore, _fileSystem, _uriTranslator, _salt, onFileAdded);
+    _fsState = new FileSystemState(_byteStore, _fileSystem, _options.target,
+        _uriTranslator, _salt, onFileAdded);
   }
 
   /// Return the [FileSystemState] that contains the current file state.
   FileSystemState get fsState => _fsState;
 
   /// Return the object that provides additional information for tests.
   @visibleForTesting
   _TestView get test => _testView;
 
   /// Return the [KernelResult] for the Dart file with the given [uri].
@@ skipping 299 matching lines @@
 
   LibraryCycleResult(this.cycle, this.signature, this.kernelLibraries);
 }
 
 @visibleForTesting
 class _TestView {
   /// The list of [LibraryCycle]s compiled for the last delta.
   /// It does not include libraries which were read from the cache.
   final List<LibraryCycle> compiledCycles = [];
 }