Support native extensions for analysis and docgen.

pkg/compiler/lib/src/elements/elements.dart

 // Copyright (c) 2012, 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 elements;
 
 
 import '../constants/expressions.dart';
 import '../tree/tree.dart';
 import '../util/util.dart';
@@ skipping 867 matching lines @@
 
   /**
    * [:true:] if this library is a platform library whose path starts with
    * an underscore.
    */
   bool get isInternalLibrary;
   bool get canUseNative;
   bool get exportsHandled;
 
   // TODO(kasperl): We should try to get rid of these.
-  void set canUseNative(bool value);
   void set libraryTag(LibraryName value);
 
   LibraryElement get implementation;
 
   void addCompilationUnit(CompilationUnitElement element);
   void addTag(LibraryTag tag, DiagnosticListener listener);
   void addImport(Element element, Import import, DiagnosticListener listener);
 
   /// Record which element an import or export tag resolved to.
   /// (Belongs on builder object).
@@ skipping 703 matching lines @@
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }