Mirrors implemented via patches. 2nd try.

sdk/lib/mirrors/mirrors_impl.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.
 
-// The dart:mirrors library provides reflective access for Dart program.
-//
-// For the purposes of the mirrors library, we adopt a naming
-// convention with respect to getters and setters.  Specifically, for
-// some variable or field...
-//
-//   var myField;
-//
-// ...the getter is named 'myField' and the setter is named
-// 'myField='.  This allows us to assign unique names to getters and
-// setters for the purposes of member lookup.
-
-// #library("mirrors");
-
 /**
  * A [MirrorSystem] is the main interface used to reflect on a set of
  * associated libraries.
  *
  * At runtime each running isolate has a distinct [MirrorSystem].
  *
  * It is also possible to have a [MirrorSystem] which represents a set
  * of libraries which are not running -- perhaps at compile-time.  In
  * this case, all available reflective functionality would be
  * supported, but runtime functionality (such as invoking a function
@@ skipping 19 matching lines @@
 
   /**
    * A mirror on the [:void:] type.
    */
   TypeMirror get voidType;
 }
 
 /**
  * Returns a [MirrorSystem] for the current isolate.
  */
-MirrorSystem currentMirrorSystem() {
-  return _Mirrors.currentMirrorSystem();
-}
+external MirrorSystem currentMirrorSystem();
 
 /**
  * Creates a [MirrorSystem] for the isolate which is listening on
  * the [SendPort].
  */
-Future<MirrorSystem> mirrorSystemOf(SendPort port) {
-  return _Mirrors.mirrorSystemOf(port);
-}
+external Future<MirrorSystem> mirrorSystemOf(SendPort port);
 
 /**
  * Returns an [InstanceMirror] for some Dart language object.
  *
  * This only works if this mirror system is associated with the
  * current running isolate.
  */
-InstanceMirror reflect(Object reflectee) {
-  return _Mirrors.reflect(reflectee);
-}
+external InstanceMirror reflect(Object reflectee);
 
 /**
  * A [Mirror] reflects some Dart language entity.
  *
  * Every [Mirror] originates from some [MirrorSystem].
  */
 abstract class Mirror {
   /**
    * The [MirrorSystem] that contains this mirror.
    */
@@ skipping 647 matching lines @@
 
 /**
  * A [MirrorException] is used to indicate errors within the mirrors
  * framework.
  */
 class MirrorException implements Exception {
   const MirrorException(String this._message);
   String toString() => "MirrorException: '$_message'";
   final String _message;
 }