Add python wrapper for test.dart.

tools/testing/dart/test_options.dart

 // Copyright (c) 2011, 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_options_parser");
 
 List<String> defaultTestSelectors =
     const ['dartc', 'samples', 'standalone', 'corelib', 'co19', 'language',
            'isolate', 'stub-generator', 'vm', 'client'];
 
@@ skipping 276 matching lines @@
       // TODO(ager): Get rid of this when there is only one checkout and
       // we don't have to special case for the runtime checkout.
       File valgrindFile = new File('runtime/tools/valgrind.py');
       if (!valgrindFile.existsSync()) {
         valgrindFile = new File('../runtime/tools/valgrind.py');
       }
       String valgrind = valgrindFile.fullPathSync();
       configuration['special-command'] = 'python -u $valgrind @';
     }
 
-    // Use verbose progress indication for verbose output.
-    if (configuration['verbose']) {
+    // Use verbose progress indication for verbose output unless buildbot
+    // progress indication is requested.
+    if (configuration['verbose'] && configuration['progress'] != 'buildbot') {
       configuration['progress'] = 'verbose';
     }
 
     // Create the artificial 'unchecked' option that test status files
     // expect.
     configuration['unchecked'] = !configuration['checked'];
 
     // Expand the test selectors into a suite name and a simple
     // regular expressions to be used on the full path of a test file
     // in that test suite. If no selectors are explicitly given use
@@ skipping 130 matching lines @@
       if (option.keys.some((key) => key == name)) {
         return option;
       }
     }
     return null;
   }
 
 
   List<_TestOptionSpecification> _options;
 }