Change simpleName of anonymous mixin applications.

dart/tests/lib/lib.status

Index: dart/tests/lib/lib.status
diff --git a/dart/tests/lib/lib.status b/dart/tests/lib/lib.status
index c93b83e3d6ee0b2a9626335ef406a8f9293869a2..6a688f88dabfe9f9ae384951218ddc2b8c377e5a 100644
--- a/dart/tests/lib/lib.status
+++ b/dart/tests/lib/lib.status
@@ -23,7 +23,7 @@ mirrors/method_mirror_properties_test: Fail # Issue 11861
 mirrors/method_mirror_returntype_test : Fail # Issue 11928
 mirrors/method_mirror_source_test : Fail # Issue 6490
 mirrors/mirrors_test: Fail # TODO(ahe): I'm working on fixing this.
-mirrors/mixin_test: Fail # Issue 12464
+mirrors/mixin_test/none: Fail # Issue 12464
 mirrors/null_test : Fail # Issue 12129
 mirrors/parameter_test: Fail # Issue 6490
 mirrors/library_uri_io_test: Skip # Not intended for dart2js as it uses dart:io.
@@ -118,6 +118,7 @@ mirrors/native_class_test: Fail, OK # This test is meant to run in a browser.
 async/run_async3_test: Fail # _enqueueImmediate runs after Timer. http://dartbug.com/9001.
 mirrors/mixin_dart2js_test: Skip # TODO(ahe): This test is slightly broken. http://dartbug.com/12464
 mirrors/hierarchy_test: Fail # TODO(ahe): This test is slightly broken. http://dartbug.com/12464
+mirrors/mixin_test/01: Fail, OK # TODO(ahe): Slight broken test to ensure test coverage on dart2js.
 
 [ $compiler == none && $runtime == drt ]
 async/timer_isolate_test: Skip # See Issue 4997