Restart IE 10 browser as we do with Android browsers on buildbot, to improve stability

tools/testing/dart/browser_controller.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 browser;
 
 import "dart:async";
 import "dart:convert" show LineSplitter, UTF8, JSON;
 import "dart:core";
 import "dart:io";
 
@@ skipping 1136 matching lines @@
     }
     if (testQueue.isEmpty) return null;
 
     // We are currently terminating this browser, don't start a new test.
     if (status.timeout) return null;
 
     // Restart content_shell and dartium on Android if they have been
     // running for longer than RESTART_BROWSER_INTERVAL. The tests have
     // had flaky timeouts, and this may help.
     if ((browserName == 'ContentShellOnAndroid' ||
-         browserName == 'DartiumOnAndroid' ) &&
+         browserName == 'DartiumOnAndroid' ||
+         browserName == 'ie10') &&
         status.timeSinceRestart.elapsed > RESTART_BROWSER_INTERVAL) {
       var id = status.browser.id;
       // Reset stopwatch so we don't trigger again before restarting.
       status.timeout = true;
       status.browser.close().then((_) {
         // We don't want to start a new browser if we are terminating.
         if (underTermination) return;
         restartBrowser(id);
       });
       // Don't send a test to the browser we are restarting.
@@ skipping 624 matching lines @@
     </div>
     <div id="embedded_iframe_div" class="test box">
       <iframe style="width:100%;height:100%;" id="embedded_iframe"></iframe>
     </div>
   </body>
 </html>
 """;
     return driverContent;
   }
 }