Multitest has a 'checked mode compile-time error' marker now. Use it to clean up the mirrors status…

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index a43471fb28a2e8023f3a3e56794861131ed767e2..dbcecd02b33ac4bf27a0e0689ddef035cc8994c4 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -2,12 +2,6 @@
 # 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.
 
-[ $checked && $compiler != dartanalyzer && $compiler != dart2analyzer && $runtime != dartium ]
-mirrors/regress_16321_test/01: CompileTimeError # Issue 16351
-
-[ $checked && $compiler == none && ($runtime == dartium || $runtime == drt) ]
-mirrors/regress_16321_test/01: RunTimeError # Issue 16351
-
 [ $unchecked ]
 mirrors/redirecting_factory_different_type_test: SkipByDesign # Tests type checks.
 
@@ -300,6 +294,9 @@ mirrors/deferred_mirrors_metadata_test: Fail # Issue 17522
 profiler/metrics_test: Fail # Issue 20309
 profiler/metrics_num_test: Fail # Issue 20309
 
+[ ($compiler == dartanalyzer || $compiler == dart2analyzer) && $checked ]
+mirrors/regress_16321_test/01: MissingCompileTimeError # Issue 16391
+
 [ $compiler == dart2js && $runtime == d8 && $system == windows ]
 async/*deferred*: Skip # Issue 17458
 mirrors/*deferred*: Skip # Issue 17458