Migrated test block 171 to Dart 2.0.

tests/lib_strong/lib_strong.status

Index: tests/lib_strong/lib_strong.status
diff --git a/tests/lib_strong/lib_strong.status b/tests/lib_strong/lib_strong.status
index 0ebfc7a138a34f6a280cc2bf1b6e23064176eabd..fb5ce4b46fca1d7060c48cc9a913a1e10aafa9cc 100644
--- a/tests/lib_strong/lib_strong.status
+++ b/tests/lib_strong/lib_strong.status
@@ -22,7 +22,8 @@ async/future_test/none: Skip
 async/future_test/01: Skip
 async/future_test/none: Skip
 async/future_value_chain4_test: Skip
-async/slow_consumer3_test: Skip
+async/print_test/01: Skip
+async/print_test/none: Skip
 async/stream_controller_test: Skip
 async/stream_event_transformed_test: Skip
 async/stream_transformer_test: Skip
@@ -188,7 +189,6 @@ html/custom/regress_194523002_test: Crash # Issue 29922
 async/future_or_bad_type_test/none: RuntimeError # Issue 29922
 async/future_or_non_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