Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/lib/compiler/implementation/lib/mirrors.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("dart:mirrors");
 
-import "dart:isolate";
+#import("dart:isolate");
 
-part "../../../mirrors/mirrors.dart";
+#source("../../../mirrors/mirrors.dart");
 
 /**
  * Stub class for the mirror system.
  */
 class _Mirrors {
   static MirrorSystem currentMirrorSystem() {
     throw new UnsupportedOperationException("MirrorSystem not implemented");
   }
 
   static Future<MirrorSystem> mirrorSystemOf(SendPort port) {
     throw new UnsupportedOperationException("MirrorSystem not implemented");
   }
 
   static InstanceMirror reflect(Object reflectee) {
     throw new UnsupportedOperationException("MirrorSystem not implemented");
   }
 }