Add safari cache clearing browser functionality to the safari browser.

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";
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               ),
           new _TestOptionSpecification(
               'use_browser_controller',
               'Use the new selenium replacement browser-controller.',
               ['--use_browser_controller'],
               [],
               false,
               '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.'
               'This address is also used for browsers to connect.',
               ['--local_ip'],
               [],
               '127.0.0.1'),
           new _TestOptionSpecification(
               'record_to_file',
               'Records all the commands that need to be executed and writes it '
               'out to a file.',
@@ skipping 403 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }