Remove the --use_browser_controller flag, now that it is always true.

tools/testing/dart/test_options.dart

 // Copyright (c) 2013, 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;
 
 import "dart:io";
 import "dart:math";
 import "drt_updater.dart";
 import "test_suite.dart";
@@ skipping 284 matching lines @@
               ),
           new _TestOptionSpecification(
               'write_debug_log',
               'Don\'t write debug messages to stdout but rather to a logfile.',
               ['--write-debug-log'],
               [],
               false,
               'bool'
               ),
           new _TestOptionSpecification(
-              'use_browser_controller',
-              'Use the new selenium replacement browser-controller.',
-              ['--use_browser_controller'],
-              [],
-              true,
-              'bool'
-              ),
-          new _TestOptionSpecification(
               'clear_safari_cache',
               'Clear the safari cache (i.e., delete it).',
               ['--clear_safari_cache'],
               [],
               false,
               'bool'
               ),
           new _TestOptionSpecification(
               'local_ip',
               'IP address the http servers should listen on.'
@@ skipping 475 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }