Fix pkg/analyzer/tool/task_dependency_graph/check_test.

pkg/pkg.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.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 86 matching lines @@
 observe/test/unique_message_test: SkipByDesign  # Uses dart:io.
 dart_messages/test/dart_messages_test: Skip  # Uses dart:io.
 
 [ $runtime == vm && ($arch == simarm64 || $arch == simarm || $arch == simarmv6 || $arch == simarmv5te || $arch == simmips || $arch == armv6 || $arch == armv5te) ]
 # Timeout. These are not unit tests. They do not run efficiently on our
 # simulator or low-end devices.
 *: Skip
 
 [ $runtime == vm ]
 analyzer/test/file_system/physical_resource_provider_test: Pass, Fail # Issue 25472
-analyzer/tool/task_dependency_graph/check_test: RuntimeError # Fails without a package root
 # Skip tests on the VM if the package depends on dart:html
 mutation_observer: Skip
 
 [ $compiler == dart2js && $runtime == chrome && $system == macos ]
 third_party/di_tests/di_test: Pass, Slow # Issue 22896
 
 [ $use_repository_packages ]
 analyzer/test/*: PubGetError
 
 [ $compiler == dart2js && $cps_ir && $host_checked ]
@@ skipping 52 matching lines @@
 analyzer/test/src/task/strong/checker_test: Crash # Issue 24485
 analyzer/test/src/task/strong/inferred_type_test: Crash # Issue 24485
 analyzer/test/src/task/strong_mode_test: Crash # Issue 24485
 analyzer/test/src/task/yaml_test: Crash # Issue 24485
 
 [ $noopt || $runtime == dart_precompiled || $runtime == dart_app ]
 *: SkipByDesign # The pkg test framework imports dart:mirrors.
 
 [ $compiler == dart2js && $cps_ir && $checked ]
 *: Skip # `assert` not implemented, about 75% tests crash