Revert "Dart2js testing: Add prefix files when running dart2js output on d8 or jsshell."

tools/testing/dart/test_suite.dart

 // 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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 976 matching lines @@
       // Do not attempt to run the compiled result. A compilation
       // error should be reported by the compilation command.
       return commands;
     }
 
     RuntimeConfiguration runtimeConfiguration =
         new RuntimeConfiguration(configuration);
     List<String> runtimeArguments =
         compilerConfiguration.computeRuntimeArguments(
             runtimeConfiguration,
-            buildDir,
             info,
             vmOptions, sharedOptions, args,
             compilationArtifact);
 
     return commands
         ..addAll(
             runtimeConfiguration.computeRuntimeCommands(
                 this,
                 CommandBuilder.instance,
                 compilationArtifact,
@@ skipping 1174 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
    }
 }