Change test to work with app-snapshots.

tests/language/language.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.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ $compiler == none || $compiler == precompiler || $compiler == app_jit ]
 # Other issues:
 generic_methods_type_expression_test: RuntimeError # Issue 25869
@@ skipping 82 matching lines @@
 config_import_test: Fail # Issue 14651.
 vm/optimized_guarded_field_isolates_test: RuntimeError, OK  # Uses Isolate.spawn.
 main_test/01: Fail # Issue 20028
 main_test/02: Fail # Issue 20028
 main_test/04: Fail # Issue 20028
 main_test/05: Fail # Issue 20028
 main_test/21: Fail # Issue 20028
 main_test/42: Fail # Issue 20028
 mirror_in_static_init_test: Fail # Issue 22071
 vm/debug_break_enabled_vm_test/*: Skip # Issue 14651.
+vm/regress_28325_test: SkipByDesign  # Requires dart:io
 
 # These tests need the flag --initializing-formal-access to pass:
 initializing_formal_access_test: Skip
 initializing_formal_capture_test: Skip
 initializing_formal_final_test: Skip
 initializing_formal_promotion_test: Skip
 initializing_formal_type_test: Skip
 parameter_initializer5_test: Skip
 
 # Experimental feature: Syntactic support for generic methods.
@@ skipping 212 matching lines @@
 vm/optimized_stacktrace_test: Pass, Crash # Issue 28276
 
 [$compiler == dart2analyzer]
 vm/regress_27201_test: SkipByDesign # Loads bad library, so will always crash.
 config_import_corelib_test: StaticWarning, OK
 
 null_bottom_test/none: StaticWarning, CompileTimeError # Issue 28025
 null_bottom_test/01: Pass, CompileTimeError # Issue 28025
 null_bottom_test/02: Pass, CompileTimeError # Issue 28025
 null_bottom_test/03: Pass, CompileTimeError # Issue 28025