Enable deferred tests on d8/Windows.

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
 setter4_test: CompileTimeError # issue 13639
 
 async_star_cancel_while_paused_test: RuntimeError # Issue 22853
@@ skipping 225 matching lines @@
 # 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
 
-[ $compiler == dart2js && $runtime == d8 && $system == windows ]
-# Detection of d8 runtime does not work on Windows so the runtime result is
-# unreliable; at the time of writing, 32 passed, 31 failed with runtime error.
-# Marked with Pass,RuntimeError to avoid undetected compile-time failures.
-*deferred*: Pass,RuntimeError # Issue 17458
-cha_deopt*: Pass,RuntimeError # Issue 17458
-regress_22443_test: Pass,RuntimeError # Issue 17458
-
 [ $compiler == dart2js && $cps_ir == false ]
 accessor_conflict_export2_test: Crash # Issue 25626
 accessor_conflict_export_test: Crash # Issue 25626
 generic_field_mixin4_test: Crash # Issue 18651
 generic_field_mixin5_test: Crash # Issue 18651
 many_method_calls_test: Crash # Stack overflow in HGraphVisitor.visitPostDominatorTree.visitBasicBlockAndSuccessors
 method_override5_test: RuntimeError # Issue 12809
 super_no_such_method4_test/01: RuntimeError # Issue 25716
 super_no_such_method5_test/01: RuntimeError # Issue 25716
 
@@ skipping 72 matching lines @@
 try_finally_regress_25333_test: Crash # Issue 24485
 
 [ $compiler == dart2js && $cps_ir && $checked ]
 *: Skip # `assert` not implemented
 
 [ $compiler == dart2js && $host_checked ]
 regress_26855_test/1: Crash # Issue 26867
 regress_26855_test/2: Crash # Issue 26867
 regress_26855_test/3: Crash # Issue 26867
 regress_26855_test/4: Crash # Issue 26867