Mark test as runtime failure

pkg/dev_compiler/test/not_yet_strong_tests.dart

 import 'dart:collection';
 
 /// The set of tests that are not yet strong mode safe.
 final notYetStrongTests = new HashSet<String>.from([
   'language/abstract_exact_selector_test_01_multi',
   'language/abstract_factory_constructor_test_00_multi',
   'language/abstract_getter_test_01_multi',
   'language/abstract_runtime_error_test_01_multi',
   'language/abstract_runtime_error_test_02_multi',
   'language/abstract_runtime_error_test_03_multi',
@@ skipping 2345 matching lines @@
   'language/prefix2_negative_test',
   'language/prefix3_negative_test',
   'language/prefix4_negative_test',
   'language/prefix5_negative_test',
   'language/prefix6_negative_test',
   'language/prefix7_negative_test',
   'language/prefix8_negative_test',
   'language/private_member1_negative_test',
   'language/private_member2_negative_test',
   'language/private_member3_negative_test',
-  'language/regress_18535_test',
   'language/script1_negative_test',
   'language/script2_negative_test',
   'language/setter4_test',
   'language/setter_declaration2_negative_test',
   'language/setter_declaration_negative_test',
   'language/source_self_negative_test',
   'language/static_call_wrong_argument_count_negative_test',
   'language/string_escape4_negative_test',
   'language/string_interpolate1_negative_test',
   'language/string_interpolate2_negative_test',
@@ skipping 61 matching lines @@
   'lib/html/mutationobserver_test',
   'lib/html/postmessage_structured_test',
   'lib/html/resource_http_test',
   'lib/html/transferables_test',
   'lib/html/webgl_1_test',
   'lib/html/wrapping_collections_test',
   // TODO(jmesserly): these are both under "dart:html" as well.
   'js_test',
   'js_util_test'
 ]);