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

pkg/dart2js_incremental/lib/library_updater.dart

Index: pkg/dart2js_incremental/lib/library_updater.dart
diff --git a/pkg/dart2js_incremental/lib/library_updater.dart b/pkg/dart2js_incremental/lib/library_updater.dart
index b8a5c62da3b506863fcb63441d5c5f2a301b17bc..a5cdc02110276688ec6cec9faece95266d36f6eb 100644
--- a/pkg/dart2js_incremental/lib/library_updater.dart
+++ b/pkg/dart2js_incremental/lib/library_updater.dart
@@ -330,10 +330,10 @@ class LibraryUpdater extends JsFeatures {
       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);