Update status for flaky browser tests

tests/language/language_dart2js.status

 # Copyright (c) 2012, 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.
 
 [ $compiler == dart2js ]
 getter_setter_in_lib_test: Fail # Issue 23288
 method_name_test: Fail # issue 25574
 
 async_star_cancel_while_paused_test: RuntimeError # Issue 22853
 tearoff_basic_test: Skip # Tear-off not supported
@@ skipping 209 matching lines @@
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
 
 [ $compiler == dart2js && ($runtime == safari || $runtime == safarimobilesim)]
 round_test: Fail, OK # Common JavaScript engine Math.round bug.
 
 [ $compiler == dart2js && $runtime == ff ]
 round_test: Pass, Fail, OK # Fixed in ff 35. Common JavaScript engine Math.round bug.
 
+[ $compiler == dart2js && $runtime == chrome && $system == macos ]
+await_future_test: Pass, Timeout # Issue 26735
+
 [ $compiler == dart2js && ($runtime == safari || $runtime == safarimobilesim)]
 # Safari codegen bug, fixed on some versions of Safari 7.1 (Version 7.1 (9537.85.10.17.1))
 call_through_getter_test: Fail, OK
 
 [ $compiler == dart2js && $runtime == chromeOnAndroid ]
 override_field_test/02: Pass, Slow # TODO(kasperl): Please triage.
 
 [ $minified ]
 stack_trace_test: Fail, OK # Stack trace not preserved in minified code.
 regress_21795_test: RuntimeError # Issue 12605
@@ skipping 85 matching lines @@
 accessor_conflict_export_test: Crash # Duplicate export of 'x'
 async_throw_in_catch_test/forceAwait: Crash # Issue 24485
 async_throw_in_catch_test/none: Crash # Issue 24485
 execute_finally9_test: Crash # Issue 24485
 regress_21795_test: Crash # Issue 24485
 regress_23537_test: Crash # Issue 24485
 try_finally_regress_25333_test: Crash # Issue 24485
 
 [ $compiler == dart2js && $cps_ir && $checked ]
 *: Skip # `assert` not implemented