Remove system-provided temporary directory usage from test scripts.

tools/test.dart

 #!/usr/bin/env 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.
 
 /**
  * This file is the entrypoint of the dart test suite.  This suite is used
  * to test:
  *
  *     1. the dart vm
@@ skipping 60 matching lines @@
   if (configurations == null || configurations.length == 0) return;
 
   // Extract global options from first configuration.
   var firstConf = configurations[0];
   Map<String, RegExp> selectors = firstConf['selectors'];
   var maxProcesses = firstConf['tasks'];
   var progressIndicator = firstConf['progress'];
   var verbose = firstConf['verbose'];
   var printTiming = firstConf['time'];
   var listTests = firstConf['list'];
-  var keepGeneratedTests = firstConf['keep-generated-tests'];
 
   // Print the configurations being run by this execution of
   // test.dart. However, don't do it if the silent progress indicator
   // is used. This is only needed because of the junit tests.
   if (progressIndicator != 'silent') {
     StringBuffer sb = new StringBuffer('Test configuration');
     sb.add(configurations.length > 1 ? 's:' : ':');
     for (Map conf in configurations) {
       sb.add(' ${conf["compiler"]}_${conf["runtime"]}_${conf["mode"]}_' +
           '${conf["arch"]}');
@@ skipping 33 matching lines @@
     return true;
   }
 
   // Start process queue.
   var queue = new ProcessQueue(maxProcesses,
                                progressIndicator,
                                startTime,
                                printTiming,
                                enqueueConfiguration,
                                verbose,
-                               listTests,
-                               keepGeneratedTests);
+                               listTests);
 }