Mark ie10 + Windows as an acceptable browser + OS combo.

tools/testing/run_selenium.py

 #!/usr/bin/python
 
 # Copyright (c) 2011, 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.
 #
 
 """Script to actually open a browser and perform the test, and reports back with
 the result. It uses Selenium WebDriver when possible for running the tests. It
 uses Selenium RC for Safari.
@@ skipping 155 matching lines @@
   elif browser == 'ff':
     script_dir = os.path.dirname(os.path.abspath(__file__))
     profile = selenium.webdriver.firefox.firefox_profile.FirefoxProfile()
     profile.set_preference('dom.max_script_run_time', 0)
     profile.set_preference('dom.max_chrome_script_run_time', 0)
     profile.set_preference('app.update.auto', True)
     profile.set_preference('app.update.enabled', True)
     xpi = os.path.join(script_dir, 'extensions', 'firefox',                               'ConsoleCollector.xpi')
     profile.add_extension(xpi);
     return selenium.webdriver.Firefox(firefox_profile=profile)
-  elif browser == 'ie9' and platform.system() == 'Windows':
+  elif ((browser == 'ie9' or browser == 'ie10') and 
+      platform.system() == 'Windows'):
     return selenium.webdriver.Ie()
   elif browser == 'safari' and platform.system() == 'Darwin':
     # TODO(efortuna): Ensure our preferences (no pop-up blocking) file is the
     # same (Safari auto-deletes when it has too many "crashes," or in our case,
     # timeouts). Come up with a less hacky way to do this.
     backup_safari_prefs = os.path.dirname(__file__) + '/com.apple.Safari.plist'
     if os.path.exists(backup_safari_prefs):
       shutil.copy(backup_safari_prefs,
            '/Library/Preferences/com.apple.Safari.plist')
     sel = selenium.selenium('localhost', 4444, "*safari", 'file://' + html_out)
@@ skipping 150 matching lines @@
   browser = start_browser(browser_name, executable_path, html_out)
 
   try:
     output = run_test_in_browser(browser, html_out, timeout, mode)
     return report_results(mode, output, browser)
   finally:
     close_browser(browser)
 
 if __name__ == "__main__":
   sys.exit(main(sys.argv))