Make Safari tests more robust.

tools/testing/dart/test_configurations.dart

 // Copyright (c) 2012, 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_configurations;
 
 import "dart:async";
 import 'dart:io';
 import "dart:math" as math;
 
@@ skipping 51 matching lines @@
   BuildbotProgressIndicator.stepName = firstConf['step_name'];
   var verbose = firstConf['verbose'];
   var printTiming = firstConf['time'];
   var listTests = firstConf['list'];
 
   var reportInJson = firstConf['report_in_json'];
 
   var recordingPath = firstConf['record_to_file'];
   var recordingOutputPath = firstConf['replay_from_file'];
 
-  Browser.deleteCache = firstConf['clear_browser_cache'];
+  Browser.resetBrowserConfiguration = firstConf['reset-browser-configuration'];
 
   if (recordingPath != null && recordingOutputPath != null) {
     print("Fatal: Can't have the '--record_to_file' and '--replay_from_file'"
         "at the same time. Exiting ...");
     exit(1);
   }
 
   if (!firstConf['append_logs']) {
     var files = [
       new File(TestUtils.flakyFileName()),
@@ skipping 223 matching lines @@
       maxBrowserProcesses,
       startTime,
       testSuites,
       eventListener,
       allTestsFinished,
       verbose,
       recordingPath,
       recordingOutputPath,
       adbDevicePool);
 }