Change output of test.dart --list option, so it can be parsed automatically.

tools/testing/dart/test_runner.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.
 
 #library("test_runner");
 
 #import("dart:io");
 #import("status_file_parser.dart");
 #import("test_progress.dart");
 #import("test_suite.dart");
@@ skipping 477 matching lines @@
           // Let's be extra careful, since rm -rf is so dangerous.
           print('Temporary directory $_temporaryDirectory unsafe to delete!');
           _progress.allDone();
         } else {
           // TODO(dart:1211): Use delete(recursive=true) in Dart when it is
           // implemented, and add Windows support.
           var deletion =
               new Process.start('/bin/rm', ['-rf', _temporaryDirectory]);
           deletion.exitHandler = (int exitCode) {
             if (exitCode == 0) {
-              print('\nTemporary directory $_temporaryDirectory deleted.');
+              if (!_listTests) {  // Output of --list option is used by scripts.
+                print('\nTemporary directory $_temporaryDirectory deleted.');
+              }
             } else {
               print('\nDeletion of temp dir $_temporaryDirectory failed.');
             }
             _progress.allDone();
           };
         }
       }
     }
   }
 
@@ skipping 22 matching lines @@
     }
     throw new Exception('Unable to find inactive batch runner.');
   }
 
   void _tryRunTest() {
     _checkDone();
     if (_numProcesses < _maxProcesses && !_tests.isEmpty()) {
       TestCase test = _tests.removeFirst();
       if (_verbose) print(test.commandLine);
       if (_listTests) {
-        print(test.commandLine);
+        final String tab = '\t';
+        String outcomes =
+            Strings.join(new List.from(test.expectedOutcomes), ',');
+        print(test.displayName + tab + outcomes + tab + test.isNegative +
+              tab + Strings.join(test.arguments, tab));
         return;
       }
       _progress.start(test);
       Function oldCallback = test.completedHandler;
       Function wrapper = (TestCase test_arg) {
         _numProcesses--;
         _progress.done(test_arg);
         _tryRunTest();
         oldCallback(test_arg);
       };
       test.completedHandler = wrapper;
       if (test.configuration['component'] == 'dartc'  &&
           test.displayName != 'dartc/junit_tests') {
         _ensureDartcBatchRunnersStarted(test.executablePath);
         _getDartcBatchRunnerProcess().startTest(test);
       } else {
         new RunningProcess(test).start();
       }
       _numProcesses++;
     }
   }
 }