Revert "Delete app jit or aot snapshots as each test is completed to reduce the amount of disk spac…

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 219 matching lines @@
     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;
-    var commands = new List<Command>();
-    commands.add(commandBuilder.getVmCommand(executable,
-                                             arguments,
-                                             environmentOverrides,
-                                             needsDFERunner: needsDFERunner));
-    if (type == 'application/dart-snapshot') {
-      // Delete snapshots as we go to reduce the space required to run the test
-      // suite.
-      commands.add(commandBuilder.getDeleteCommand(script));
-    }
-    return commands;
+    return <Command>[
+      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,
       List<String> arguments,
@@ skipping 22 matching lines @@
       CommandBuilder commandBuilder,
       CommandArtifact artifact,
       List<String> arguments,
       Map<String, String> environmentOverrides) {
     String script = artifact.filename;
     String type = artifact.mimeType;
     if (script != null && type != 'application/dart-precompiled') {
       throw "dart_precompiled cannot run files of type '$type'.";
     }
 
-    var commands = new List<Command>();
-    commands.add(commandBuilder.getVmCommand(suite.dartPrecompiledBinaryFileName,
-                                             arguments, environmentOverrides));
-    // Delete snapshots (dylibs or blobs) as we go to reduce the space required
-    // to run the test suite.
-    commands.add(commandBuilder.getDeleteCommand(script));
-    return commands;
+    return <Command>[
+      commandBuilder.getVmCommand(suite.dartPrecompiledBinaryFileName,
+          arguments, environmentOverrides)
+    ];
   }
 }
 
 class DartPrecompiledAdbRuntimeConfiguration
       extends DartVmRuntimeConfiguration {
   static const String DeviceDir =
       '/data/local/tmp/precompilation-testing';
   static const String DeviceTestDir =
       '/data/local/tmp/precompilation-testing/test';
 
@@ skipping 64 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'";
   }
 }