Update for latest tests and sdk

pkg/dev_compiler/test/browser/language_tests.js

Index: pkg/dev_compiler/test/browser/language_tests.js
diff --git a/pkg/dev_compiler/test/browser/language_tests.js b/pkg/dev_compiler/test/browser/language_tests.js
index 48605eaf776eecb589d6c318e1776ed0e5db1bef..b96e4f6549d848b4f5651c58b33cf5288d3da3a3 100644
--- a/pkg/dev_compiler/test/browser/language_tests.js
+++ b/pkg/dev_compiler/test/browser/language_tests.js
@@ -108,7 +108,10 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'const_switch_test_02_multi': fail,
       'const_switch_test_04_multi': fail,
       'constructor12_test': fail,
+      'covariant_subtyping_tearoff2_test': fail,     
+      'covariant_subtyping_tearoff3_test': fail,
       'covariant_subtyping_unsafe_call2_test': fail,
+      'covariant_subtyping_unsafe_call3_test': fail,
       'cyclic_type2_test': fail,
       'cyclic_type_test_00_multi': fail,
       'cyclic_type_test_01_multi': fail,
@@ -241,6 +244,7 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'stack_overflow_test': fail,
       'stacktrace_rethrow_error_test_none_multi': fail,
       'stacktrace_rethrow_error_test_withtraceparameter_multi': fail,
+      'stacktrace_rethrow_nonerror_test': fail,
       'stacktrace_test': chrome_fail,
       'string_interpolate_null_test': fail,
       'switch_label2_test': fail,
@@ -391,6 +395,7 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'custom_element_name_clash_test': async_unittest,
       'custom_elements_23127_test': async_unittest,
       'custom_elements_test': async_unittest,
+      'debugger_test': firefox_fail,
       'element_animate_test': 'unittest',
 
       // https://github.com/dart-lang/sdk/issues/27579.