Improve the mirror support for deferred loading.

sdk/lib/_internal/compiler/implementation/compiler.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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 334 matching lines @@
 
   /**
    * Records global dependencies, that is, dependencies that don't
    * correspond to a particular element.
    *
    * We should get rid of this and ensure that all dependencies are
    * associated with a particular element.
    */
   final TreeElements globalDependencies = new TreeElementMapping(null);
 
+  /**
+   * Dependencies that are only included due to mirrors.
+   *
+   * We should get rid of this and ensure that all dependencies are
+   * associated with a particular element.
+   */
+  final TreeElements mirrorDependencies = new TreeElementMapping(null);
+
   final bool enableMinification;
   final bool enableTypeAssertions;
   final bool enableUserAssertions;
   final bool trustTypeAnnotations;
   final bool enableConcreteTypeInference;
   final bool disableTypeInferenceFlag;
   final bool dumpInfo;
 
   /**
    * The maximum size of a concrete type before it widens to dynamic during
@@ skipping 1426 matching lines @@
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }
 
 /// Information about suppressed warnings and hints for a given library.
 class SuppressionInfo {
   int warnings = 0;
   int hints = 0;
 }