Add again the *necessary* timeout markers for tests running on ie9/ie10

dart/tools/test.dart

 #!/usr/bin/env 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.
 
 /**
  * This file is the entrypoint of the dart test suite.  This suite is used
  * to test:
  *
  *     1. the dart vm
@@ skipping 141 matching lines @@
           print('Started HttpServers: $commandline');
         });
       }
     }
 
     if (conf['runtime'].startsWith('ie')) {
       // NOTE: We've experienced random timeouts of tests on ie9/ie10. The
       // underlying issue has not been determined yet. Our current hypothesis
       // is that windows makes bad scheduling decisions if we overload a
       // machine (i.e. some processes seem to starve).
-      maxProcesses = math.max(1, maxProcesses-2);
       maxBrowserProcesses = 1;
     } else if (conf['runtime'].startsWith('safari') &&
                conf['use_browser_controller']) {
       // Safari does not allow us to run from a fresh profile, so we can only
       // use one browser.
       maxBrowserProcesses = 1;
     }
 
     for (String key in selectors.keys) {
       if (key == 'co19') {
@@ skipping 128 matching lines @@
 void main() {
   deleteTemporaryDartDirectories().then((_) {
     var optionsParser = new TestOptionsParser();
     var configurations = optionsParser.parse(new Options().arguments);
     if (configurations != null && configurations.length > 0) {
       testConfigurations(configurations);
     }
   });
 }