Improve the mirror support for deferred loading.

sdk/lib/_internal/compiler/implementation/compiler.dart

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/sdk/lib/_internal/compiler/implementation/compiler.dart b/sdk/lib/_internal/compiler/implementation/compiler.dart
index c756277a8f02eea7e5c69bfaf008adcc7d05496b..5626c953d86db04899f17e4b9c120fc5f849a3fe 100644
--- a/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -352,6 +352,11 @@ abstract class Compiler implements DiagnosticListener {
    */
   final TreeElements globalDependencies = new TreeElementMapping(null);
 
+  /**
+   * Dependencies that are only included due to mirrors.

[karlklose, 2014/04/01 13:48:18]

Please add a todo to get rid of this (see above comment).

[sigurdm, 2014/04/01 13:57:44]

Done.

+   */
+  final TreeElements mirrorDependencies = new TreeElementMapping(null);
+
   final bool enableMinification;
   final bool enableTypeAssertions;
   final bool enableUserAssertions;