VM: [Kernel] Switch to DFE for testing -c dartk configuration.

tools/testing/dart/runtime_configuration.dart

 // Copyright (c) 2014, 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.
 
 library runtime_configuration;
 
 import 'dart:io' show Directory, File;
 
 import 'compiler_configuration.dart' show CommandArtifact;
 
@@ skipping 209 matching lines @@
 }
 
 /// The standalone Dart VM binary, "dart" or "dart.exe".
 class StandaloneDartRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
+    final bool needsDFERunner = suite.configuration['compiler'] == 'dartk' &&
+        !suite.configuration['use-standalone-dartk'];
     String script = artifact.filename;
     String type = artifact.mimeType;
     if (script != null &&
         type != 'application/dart' &&
         type != 'application/dart-snapshot') {
       throw "Dart VM cannot run files of type '$type'.";
     }
     String executable = suite.dartVmBinaryFileName;
     return <Command>[
-      commandBuilder.getVmCommand(executable, arguments, environmentOverrides)
+      commandBuilder.getVmCommand(executable, arguments, environmentOverrides, needsDFERunner: needsDFERunner)
     ];
   }
 }
 
 /// The flutter engine binary, "sky_shell".
 class StandaloneFlutterEngineConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
@@ skipping 111 matching lines @@
 class DummyRuntimeConfiguration extends DartVmRuntimeConfiguration {
   List<Command> computeRuntimeCommands(
       TestSuite suite,
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     throw "Unimplemented runtime '$runtimeType'";
   }
 }