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

pkg/compiler/lib/src/parser/element_listener.dart

 // Copyright (c) 2015, 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.parser.element_listener;
 
+import '../compiler.dart' show
+    Compiler;
 import '../common.dart';
 import '../diagnostics/messages.dart' show
     MessageTemplate;
 import '../elements/elements.dart' show
     Element,
     LibraryElement,
     MetadataAnnotation;
 import '../elements/modelx.dart' show
     CompilationUnitElementX,
     DeclarationSite,
@@ skipping 33 matching lines @@
     closeBraceFor,
     Listener,
     ParserError,
     VERBOSE;
 
 typedef int IdGenerator();
 
 /// Options used for scanning.
 ///
 /// Use this to conditionally support special tokens.
+///
+/// TODO(johnniwinther): This class should be renamed, it is not about options
+/// in the same sense as `CompilerOptions` or `DiagnosticOptions`.
 class ScannerOptions {
   /// If `true` the pseudo keyword `native` is supported.
   final bool canUseNative;
 
   const ScannerOptions({this.canUseNative: false});
+
+  ScannerOptions.from(Compiler compiler, LibraryElement libraryElement) :
+      canUseNative = compiler.backend.canLibraryUseNative(libraryElement);
 }
 
 /**
  * A parser event listener designed to work with [PartialParser]. It
  * builds elements representing the top-level declarations found in
  * the parsed compilation unit and records them in
  * [compilationUnitElement].
  */
 class ElementListener extends Listener {
   final IdGenerator idGenerator;
@@ skipping 704 matching lines @@
                    MessageKind errorCode,
                    [Map arguments = const {}]) {
     if (currentMemberHasParseError) return; // Error already reported.
     if (suppressParseErrors) return;
     if (!memberErrors.isEmpty) {
       memberErrors = memberErrors.tail.prepend(true);
     }
     reporter.reportErrorMessage(spannable, errorCode, arguments);
   }
 }