Repeats and fixes the changes landed & reverted as CL 1789553003.

pkg/dart2js_incremental/lib/library_updater.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 dart2js_incremental.library_updater;
 
 import 'dart:async' show
     Future;
 
 import 'package:compiler/compiler.dart' as api;
@@ skipping 312 matching lines @@
       // The entry compilation unit hasn't been updated. So the tags aren't
       // changed.
       return new Future<bool>.value(false);
     }
 
     return _updatedScript(before, library).then((Script script) {
       _entrySourceFiles[library] = script.file;
       Token token = new Scanner(_entrySourceFiles[library]).tokenize();
       _entryUnitTokens[library] = token;
       // Using two parsers to only create the nodes we want ([LibraryTag]).
-      Parser parser = new Parser(new Listener());
+      Parser parser = new Parser(new Listener(), compiler.options);
       NodeListener listener = new NodeListener(
           compiler, library.entryCompilationUnit);
-      Parser nodeParser = new Parser(listener);
+      Parser nodeParser = new Parser(listener, compiler.options);
       Iterator<LibraryTag> tags = library.tags.iterator;
       while (token.kind != EOF_TOKEN) {
         token = parser.parseMetadataStar(token);
         if (parser.optional('library', token) ||
             parser.optional('import', token) ||
             parser.optional('export', token) ||
             parser.optional('part', token)) {
           if (!tags.moveNext()) return true;
           token = nodeParser.parseTopLevelDeclaration(token);
           LibraryTag tag = listener.popNode();
@@ skipping 1165 matching lines @@
         .buildFieldsHackForIncrementalCompilation(classElement);
     // TODO(ahe): Rewrite for new emitter.
     ClassBuilder builder = new ClassBuilder(classElement, namer);
     classEmitter.emitFields(cls, builder);
     return builder.fields;
   }
 }
 
 // TODO(ahe): Remove this method.
 NO_WARN(x) => x;