Mirrors implemented via patches. 2nd try.

sdk/lib/mirrors/mirrors_impl.dart

Index: sdk/lib/mirrors/mirrors_impl.dart
diff --git a/sdk/lib/mirrors/mirrors.dart b/sdk/lib/mirrors/mirrors_impl.dart
similarity index 96%
copy from sdk/lib/mirrors/mirrors.dart
copy to sdk/lib/mirrors/mirrors_impl.dart
index baeb939c0816407e0683f600148962703e98926e..31effd0c92697485c06593a2de7a7633268c28d2 100644
--- a/sdk/lib/mirrors/mirrors.dart
+++ b/sdk/lib/mirrors/mirrors_impl.dart
@@ -2,18 +2,6 @@
 // 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.
 
-// 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 dart.mirrors;
-
 /**
  * A [MirrorSystem] is the main interface used to reflect on a set of
  * associated libraries.
@@ -53,17 +41,13 @@ abstract class MirrorSystem {
 /**
  * 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.
@@ -71,9 +55,7 @@ Future<MirrorSystem> mirrorSystemOf(SendPort port) {
  * 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.