Migrated test block 168 to Dart 2.0.

tests/lib_strong/lib_strong.status

 # Copyright (c) 2016, 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.
 
 # Skip entire suite if not running in strong mode.
 [ ! $strong ]
 *: SkipByDesign
 
 # Skip tests that are not yet strong-mode clean.
 [ $strong ]
 async/async_await_sync_completer_test: Skip
 async/async_await_zones_test: Skip
 async/catch_errors2_test: Skip
 async/catch_errors3_test: Skip
-async/catch_errors_test: Skip
-async/future_microtask_test: Skip
-async/future_or_bad_type_test/00: Skip
-async/future_or_bad_type_test/01: Skip
-async/future_or_bad_type_test/implements: Skip
-async/future_or_only_in_async_test/00: Skip
-async/future_test/none: Skip
-async/future_test/01: Skip
-async/future_test/none: Skip
-async/future_value_chain4_test: Skip
 async/print_test/01: Skip
 async/print_test/none: Skip
 async/slow_consumer3_test: Skip
 async/stream_controller_test: Skip
 async/stream_event_transformed_test: Skip
 async/stream_transformer_test: Skip
 async/zone_debug_test: Skip
 convert/chunked_conversion1_test: Skip
 convert/chunked_conversion_json_encode1_test: Skip
 convert/chunked_conversion_utf84_test: Skip
@@ skipping 145 matching lines @@
 html/custom/document_register_type_extensions_test/parsing: CompileTimeError # Issue 29922
 html/custom/document_register_type_extensions_test/registration: CompileTimeError # Issue 29922
 html/custom/document_register_type_extensions_test/single-parameter createElement: CompileTimeError # Issue 29922
 html/custom/element_upgrade_test: CompileTimeError # Issue 29922
 html/custom/entered_left_view_test: Crash # Issue 29922
 html/custom/js_custom_test: Crash # Issue 29922
 html/custom/mirrors_test: Crash # Issue 29922
 html/custom/regress_194523002_test: Crash # Issue 29922
 
 [ $compiler == dartdevc && $runtime != none ]
-async/future_or_bad_type_test/none: RuntimeError # Issue 29922
-async/future_or_non_strong_test: RuntimeError # Issue 29922
-async/future_or_strong_test: RuntimeError # Issue 29922
-async/futures_test: RuntimeError # Issue 29922
 async/slow_consumer_test: Pass, Timeout # Issue 29922
 async/timer_not_available_test: RuntimeError # Issue 29922
 async/zone_error_callback_test: RuntimeError # Issue 29922
 async/zone_run_unary_test: RuntimeError # Issue 29922
 convert/streamed_conversion_json_encode1_test: RuntimeError # Issue 29922
 convert/streamed_conversion_json_utf8_encode_test: Pass, Timeout # Issue 29922
 convert/streamed_conversion_utf8_decode_test: Pass, Timeout # Issue 29922
 convert/streamed_conversion_utf8_encode_test: Pass, Timeout # Issue 29922
 html/async_spawnuri_test: RuntimeError # Issue 29922
 html/async_test: RuntimeError # Issue 29922
@@ skipping 138 matching lines @@
 html/touchevent_test: RuntimeError # Issue 29922
 
 [ $compiler == dartdevc && $runtime == drt ]
 html/svg_test: RuntimeError # Issue 29922
 math/math_test: RuntimeError # Issue 29922
 math/math2_test: RuntimeError # Issue 29922
 
 [ $compiler == dartdevc && $system == windows ]
 convert/json_pretty_test: RuntimeError # Issue 30336
 html/xhr_test/xhr: Skip # Times out. Issue 21527