Fix video hang after around 60 seconds.

client/site_tests/realtimecomm_GTalkPlayground/realtimecomm_GTalkPlayground.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os, time
 
 from autotest_lib.client.bin import test, utils
 from autotest_lib.client.common_lib import error, site_ui
 
 class realtimecomm_GTalkPlayground(test.test):
@@ skipping 58 matching lines @@
     def run_once(self):
         self.run_cleanup()
         self.run_setup()
 
         # Launch Playground
         path = os.path.join(self.playground,
             'buzz/javascript/media/examples')
         page = 'videoplayground.html'
         para = 'callType=v'
         playground_url = "%s/%s?%s" % (path, page, para)
-        session = site_ui.ChromeSession(playground_url)
-        time.sleep(60)
-        session.close()
+        utils.run('su chronos -c \'DISPLAY=:0 \
+            XAUTHORITY=/home/chronos/.Xauthority \
+            /opt/google/chrome/chrome \
+            --no-first-run %s\' &' % playground_url)
+        time.sleep(120)
 
         # Verify log
         self.run_verification()
         self.run_cleanup()