fix #27971, implement generic function RTTI

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 097052b3ddeb038835754966eabb090e8c5e55dd..dd659996c345be9eddfc479144a717a2ed08c204 100644
--- a/pkg/dev_compiler/test/browser/language_tests.js
+++ b/pkg/dev_compiler/test/browser/language_tests.js
@@ -195,6 +195,12 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'generic_methods_dynamic_test_04_multi': fail,
       'generic_methods_recursive_bound_test_03_multi': fail,
       'generic_methods_simple_as_expression_test_02_multi': fail,
+
+      'generic_methods_generic_class_tearoff_test': fail, // Strong mode is-check failure
+      'generic_methods_tearoff_specialization_test': fail, // Strong mode is-check failure
+      'generic_methods_named_parameters_test': fail, // Strong mode is-check failure
+      'generic_methods_optional_parameters_test': fail, // Strong mode is-check failure
+
       'getter_closure_execution_order_test': fail,
       'gc_test': 'slow',
       'identical_closure2_test': fail,