Update status on safari tests that started passing after the update.

tests/lib/lib.status

 # Copyright (c) 2012, 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.
 
 [ $unchecked ]
 mirrors/redirecting_factory_different_type_test: SkipByDesign # Tests type checks.
 
 [ $compiler == dart2js ]
 async/schedule_microtask6_test: RuntimeError # global error handling is not supported. Issue 5958
 
@@ skipping 87 matching lines @@
 mirrors/typevariable_mirror_metadata_test: CompileTimeError # Issue 10905
 mirrors/type_variable_is_static_test: RuntimeError # Issue 6335
 mirrors/type_variable_owner_test/01: RuntimeError # Issue 12785
 mirrors/variable_is_const_test/none: RuntimeError # Issue 14671
 mirrors/raw_type_test/01: RuntimeError # Issue 6490
 mirrors/mirrors_reader_test: Slow, RuntimeError # Issue 16589
 
 [ $runtime == safari || $runtime == safarimobilesim ]
 typed_data/int32x4_test: Fail, Pass # Safari has an optimization bug (nightlies are already fine).
 typed_data/float32x4_test: Fail, Pass # Safari has an optimization bug (nightlies are already fine).
-mirrors/null_test: Fail # Issue 16831
 convert/json_test: Fail # https://bugs.webkit.org/show_bug.cgi?id=134920
 
 [ ($runtime == safari && $builder_tag == mac10_7)|| $runtime == safarimobilesim ]
 typed_data/setRange_2_test: Fail # Safari doesn't fully implement spec for TypedArray.set
 typed_data/setRange_3_test: Fail # Safari doesn't fully implement spec for TypedArray.set
 typed_data/setRange_4_test: Fail # Safari doesn't fully implement spec for TypedArray.set
 
 [ $compiler == dart2js && $runtime == chromeOnAndroid ]
 typed_data/setRange_2_test: RuntimeError # TODO(dart2js-team): Please triage this failure.
 typed_data/setRange_3_test: RuntimeError # TODO(dart2js-team): Please triage this failure.
@@ skipping 136 matching lines @@
 
 [ $compiler == none && $runtime == drt && $system == windows ]
 async/multiple_timer_test: Fail, Pass # See Issue 10982
 async/timer_test: Fail, Pass # See Issue 10982
 
 [ $compiler == none && $runtime == drt && $checked ]
 async/slow_consumer_test: Fail, Pass # Dartium JsInterop failure, dartbug.com/24460
 
 [ $compiler == dart2js && $runtime == safarimobilesim ]
 mirrors/mirrors_reader_test: SkipSlow # Times out. Issue 20806.
+mirrors/null_test: Fail # Issue 16831
 
 [ $compiler == dart2js && $runtime == jsshell ]
 async/schedule_microtask_test: Fail  # Preamble file does not correctly implement scheduleImmediate.
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 mirrors/generic_f_bounded_mixin_application_test: StaticWarning # Test Issue
 
 mirrors/redirecting_factory_test/01: StaticWarning # test issue X, The return type 'Class<T2, T1>' of the redirected constructor is not assignable to 'Class<T1, T2>'
 mirrors/redirecting_factory_test/none: StaticWarning # test issue X, The return type 'Class<T2, T1>' of the redirected constructor is not assignable to 'Class<T1, T2>
 
@@ skipping 81 matching lines @@
 
 [ $noopt && $arch == simarm64 ]
 async/slow_consumer2_test: Pass, RuntimeError # Issue 25726
 
 [ $noopt || $compiler == precompiler || $mode == product ]
 mirrors/*: SkipByDesign
 
 [ $noopt || $compiler == precompiler ]
 convert/chunked_conversion_utf88_test: Pass, Timeout
 convert/utf85_test: Pass, Timeout