Cascaded mirror removal revert.

tests/lib/mirrors/generics_test.dart

 // Copyright (c) 2013, 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 test.type_arguments_test;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 import 'generics_helper.dart';
@@ skipping 127 matching lines @@
                    reflect(new F<num>()).type.originalDeclaration);
   Expect.equals(reflect(new G()).type,
                 reflect(new G()).type.originalDeclaration);
   Expect.notEquals(reflect(new H()).type, /// 01: ok
                    reflect(new H()).type.originalDeclaration); /// 01: ok
   Expect.equals(reflect(new I()).type,
                 reflect(new I()).type.originalDeclaration);
 
   // Library members are all uninstantaited generics or non-generics.
   currentMirrorSystem().libraries.values.forEach((libraryMirror) {
-    libraryMirror.declarations.values.forEach((declaration) {
-      if (declaration is ClassMirror) {
-        Expect.isTrue(declaration.isOriginalDeclaration);
-        Expect.equals(declaration, declaration.originalDeclaration);
+    libraryMirror.classes.values.forEach((classMirror) {
+      // Generic typedefs are considered in a separate test.
+      if (classMirror is! TypedefMirror) {
+        Expect.isTrue(classMirror.isOriginalDeclaration);
+        Expect.equals(classMirror, classMirror.originalDeclaration);
       }
     });
   });
 
   Expect.equals(reflectClass(A).typeVariables[0].owner, reflectClass(A));
   Expect.equals(reflectClass(Z).typeVariables[0].owner, reflectClass(Z));
   Expect.notEquals(reflectClass(A).typeVariables[0],
                    reflectClass(Z).typeVariables[0]);
   Expect.equals(reflectClass(A).typeVariables[0],
                 reflectClass(A).typeVariables[0]);
 }