Add clear_browser_cache flag to test.dart

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 "drt_updater.dart";
 import "test_suite.dart";
 import "compiler_configuration.dart" show CompilerConfiguration;
@@ skipping 317 matching lines @@
               false,
               type: 'bool'),
           new _TestOptionSpecification(
               'clear_safari_cache',
               'Clear the safari cache (i.e., delete it).',
               ['--clear_safari_cache'],
               [],
               false,
               type: 'bool'),
           new _TestOptionSpecification(
+              'clear_browser_cache',
+              'Browser specific clearing of caches(i.e., delete it).',
+              ['--clear_browser_cache'],
+              [],
+              false,
+              type: 'bool'),
+          new _TestOptionSpecification(
               'copy_coredumps',
               'If we see a crash that we did not expect, copy the core dumps. '
               'to /tmp',
               ['--copy-coredumps'],
               [],
               false,
               type: 'bool'),
           new _TestOptionSpecification(
               'local_ip',
               'IP address the http servers should listen on.'
@@ skipping 321 matching lines @@
     String compiler = configuration['compiler'];
     configuration['browser'] = TestUtils.isBrowserRuntime(runtime);
     configuration['analyzer'] = TestUtils.isCommandLineAnalyzer(compiler);
 
     // Set the javascript command line flag for less verbose status files.
     configuration['jscl'] = TestUtils.isJsCommandLineRuntime(runtime);
 
     // Allow suppression that is valid for all ie versions
     configuration['ie'] = runtime.startsWith('ie');
 
+    // Temporary grace period for clear_safaci_cache
+    // See issue 18478
+    if (configuration['clear_safari_cache']) {
+      configuration['clear_browser_cache'] = true;
+    }
+
     // 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
     // the default suite patterns.
     var selectors = configuration['selectors'];
     if (selectors is !Map) {
       if (selectors == null) {
         selectors = new List.from(defaultTestSelectors);
         var exclude_suites = configuration['exclude_suite'] != null ?
               configuration['exclude_suite'].split(',') : [];
@@ skipping 138 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }