Make TypedefMirror a direct descendant of TypeMirror.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index 0f3d9fa6c5e43c0305ef3b1a78b7eda78eb2221d..0b0844633f017dc659e83d0c8ad5a442ecfb5123 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -181,13 +181,14 @@ mirrors/intercepted_object_test: Fail, OK # TODO(ahe): Slight broken test to ens
 mirrors/typedef_test/01: Fail, OK # Incorrect dart2js behavior.
 mirrors/closures_test/01: Fail, OK # Incorrect dart2js behavior.
 
-mirrors/generic_function_typedef_test: RuntimeError # Issue 12282
 mirrors/generic_f_bounded_test: RuntimeError # Issue 14000
+mirrors/generic_function_typedef_test: RuntimeError # Issue 12282
 mirrors/generic_interface_test/01: RuntimeError # Issue 14113
-mirrors/immutable_collections_test: RuntimeError # Issue 14027
-mirrors/symbol_validation_test: RuntimeError # Issue 13596
 mirrors/generic_mixin_test/01: RuntimeError # Issue 14114
 mirrors/generic_mixin_test/02: RuntimeError # Issue 14113
+mirrors/immutable_collections_test: RuntimeError # Issue 14027
+mirrors/symbol_validation_test: RuntimeError # Issue 13596
+mirrors/typevariable_mirror_metadata_test/none: RuntimeError # Issue 12282
 
 async/timer_isolate_test: Skip # See Issue 4997
 async/timer_not_available_test: SkipByDesign # only meant to test when there is no way to implement timer (currently only in d8)
@@ -214,27 +215,29 @@ convert/chunked_conversion_utf88_test: Pass, Slow # Issue 12644.
 convert/utf85_test: Pass, Slow # Issue 12644.
 
 [ $compiler == dartanalyzer ]
-mirrors/typedef_test/none: Fail # Issue 13093
+
 mirrors/generics_test/none: Fail # Issue 13432
 mirrors/generic_bounded_test/none: Fail # Issue 13432
 mirrors/generic_bounded_by_type_parameter_test/none: Fail # Issue 13432
-mirrors/generic_mixin_test/none: Fail # Issue 13432
-mirrors/invoke_named_test/none: Fail # http://dartbug.com/13612
 mirrors/generic_f_bounded_mixin_application_test: Fail # Issue 14116
 mirrors/generic_interface_test/none: Fail # Inexpressible in multitest
-
-# test issue 14016
-mirrors/typevariable_mirror_metadata_test: fail
+mirrors/generic_mixin_test/none: Fail # Issue 13432
+mirrors/invoke_named_test/none: Fail # http://dartbug.com/13612
+mirrors/typedef_test/none: Fail # Issue 13093
+mirrors/typevariable_mirror_metadata_test/none: Fail # Issue 14016 - Covering broken VM behavior until Issue 13701 fixed.
 
 [ $compiler == dart2analyzer ]
-mirrors/typedef_test/none: Fail # Issue 13093
 mirrors/generics_test/none: Fail # Issue 13432
 mirrors/generic_bounded_test/none: Fail # Issue 13432
 mirrors/generic_bounded_by_type_parameter_test/none: Fail # Issue 13432
-mirrors/generic_mixin_test/none: Fail # Issue 13432
-mirrors/invoke_named_test/none: Fail # http://dartbug.com/13612
 mirrors/generic_f_bounded_mixin_application_test: Fail # Issue 14116
 mirrors/generic_interface_test/none: Fail # Inexpressible in multitest
+mirrors/generic_mixin_test/none: Fail # Issue 13432
+mirrors/generic_mixin_applications_test: Fail # Issue 13432
+mirrors/invoke_named_test/none: Fail # http://dartbug.com/13612
+mirrors/typedef_test/none: Fail # Issue 13093
+mirrors/typedef_metadata_test: Fail # Issue 13093
+mirrors/typevariable_mirror_metadata_test/none: Fail # Issue 14016 - Covering broken VM behavior until Issue 13701 fixed.
 
 [ $compiler == none && $runtime == dartium ]
 async/schedule_microtask5_test: Pass, Timeout # Issue 13719: Please triage this failure.