Fix Safari "multitest" failure.

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 952 matching lines @@
         }
 
         List<String> args = <String>[];
         var basePath = TestUtils.dartDir().toString();
         if (!htmlPath.startsWith('/') && !htmlPath.startsWith('http')) {
           htmlPath = '/$htmlPath';
         }
         htmlPath = htmlPath.startsWith(basePath) ?
             htmlPath.substring(basePath.length) : htmlPath;
         String fullHtmlPath = htmlPath;
+        var searchStr = '?';
         if (!htmlPath.startsWith('http')) {
           // Note: If we run test.py with the "--list" option, no http servers
           // will be started. Therefore serverList is an empty list in this
           // case. So we use PORT/CROSS_ORIGIN_PORT instead of real ports.
           var serverPort = "PORT";
           var crossOriginPort = "CROSS_ORIGIN_PORT";
           if (!configuration['list']) {
             serverPort = serverList[0].port.toString();
             crossOriginPort = serverList[1].port.toString();
           }
-          fullHtmlPath = 'http://127.0.0.1:$serverPort$htmlPath?'
+          fullHtmlPath = 'http://127.0.0.1:$serverPort$htmlPath${searchStr}'
               'crossOriginPort=$crossOriginPort';
+          searchStr = '&';
         }
         if (info.optionsFromFile['isMultiHtmlTest']
             && subtestNames.length > 0) {
-          fullHtmlPath = '${fullHtmlPath}#${subtestNames[subtestIndex]}';
+          fullHtmlPath = '${fullHtmlPath}${searchStr}group='
+              '${subtestNames[subtestIndex]}';
         }
 
         if (TestUtils.usesWebDriver(runtime)) {
           args = [
               dartDir.append('tools/testing/run_selenium.py').toNativePath(),
               '--browser=$runtime',
               '--timeout=${configuration["timeout"] - 2}',
               '--out="$fullHtmlPath"'];
           if (runtime == 'dartium') {
             args.add('--executable=$dartiumFilename');
@@ skipping 908 matching lines @@
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
  * $compileErrorSkip tests are skipped on browsers due to compile-time error
 """;
     print(report);
    }
 }