Migrate async tests to strong

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 b1c662722f2552ab13afe5eecc8e54a3a5e0a2ab..097052b3ddeb038835754966eabb090e8c5e55dd 100644
--- a/pkg/dev_compiler/test/browser/language_tests.js
+++ b/pkg/dev_compiler/test/browser/language_tests.js
@@ -363,6 +363,56 @@ define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       'UC16_test': firefox_fail,
     },
 
+    'lib/async': {
+      'first_regression_test': async_unittest,
+      'future_or_bad_type_test_implements_multi': fail,
+      'future_or_bad_type_test_none_multi': fail,
+      'future_or_non_strong_test': fail,
+      'future_or_strong_test': fail,  // Strong-mode is-check fail
+      'future_timeout_test': async_unittest,
+      'multiple_timer_test': async_unittest,
+      'futures_test': fail,
+      'run_zoned6_test_01_multi': fail,
+      'run_zoned9_test_01_multi': fail,
+      'schedule_microtask2_test': async_unittest,
+      'schedule_microtask3_test': async_unittest,
+      'schedule_microtask5_test': async_unittest,
+      'stream_controller_async_test': async_unittest,
+      'stream_first_where_test': async_unittest,
+      'stream_from_iterable_test': async_unittest,
+      'stream_iterator_test': async_unittest,
+      'stream_join_test': async_unittest,
+      'stream_last_where_test': async_unittest,
+      'stream_periodic2_test': async_unittest,
+      'stream_periodic3_test': async_unittest,
+      'stream_periodic4_test': async_unittest,
+      'stream_periodic5_test': async_unittest,
+      'stream_periodic6_test': async_unittest,
+      'stream_periodic_test': async_unittest,
+      'stream_single_test': async_unittest,
+      'stream_single_to_multi_subscriber_test': async_unittest,
+      'stream_state_helper': async_unittest,
+      'stream_state_nonzero_timer_test': async_unittest,
+      'stream_state_test': async_unittest,
+      'stream_subscription_as_future_test': async_unittest,
+      'stream_subscription_cancel_test': async_unittest,
+      'stream_timeout_test': async_unittest,
+      'stream_transform_test': async_unittest,
+      'stream_transformation_broadcast_test': async_unittest,
+      'stream_transformer_from_handlers_test': fail,
+      'timer_cancel1_test': async_unittest,
+      'timer_cancel2_test': async_unittest,
+      'timer_cancel_test': async_unittest,
+      'timer_isActive_test': async_unittest,
+      'timer_not_available_test': fail,
+      'timer_repeat_test': async_unittest,
+      'timer_test': async_unittest,
+      'zone_bind_callback_test': fail,
+      'zone_error_callback_test': fail,
+      'zone_register_callback_test': fail,
+      'zone_run_unary_test': fail,
+    },
+
     'lib/collection': {
       'linked_list_test': whitelist,
     },