bots: include webdriver tests in bots.

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 134 matching lines @@
               [],
               ''),
           new _TestOptionSpecification(
               'time',
               'Print timing information after running tests',
               ['--time'],
               [],
               false,
               'bool'),
           new _TestOptionSpecification(
+              'browser',
+              'Web browser to use on webdriver tests',
+              ['-b', '--browser'],
+              ['ff', 'chrome', 'safari', 'ie'],
+              'chrome'),
+          new _TestOptionSpecification(
               'flag',
               'Component-specific extra flags, comma separated',
               ['--flag'],
               [],
               '')];
   }
 
 
   /**
    * Parse a list of strings as test options.
@@ skipping 294 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }