Added code so renderer would cleanly exit.

chrome/test/functional/PYAUTO_TESTS

 # Copyright (c) 2012 The Chromium Authors. 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 lists the pyauto tests that run as a part of the functional test
 # suite.
 #
 # Tests can be enabled on a per-platform basis. Tests not listed here will
 # not be run.
 #
@@ skipping 225 matching lines @@
       # crbug.com/98526
       '-pyauto_webdriver.PyAutoWebDriverTest.testCanConnectToRestartedBrowser',
       '-pyauto_webdriver.PyAutoWebDriverTest.testTypeIntoTextBox',
       # crbug.com/109035
       '-youtube.YoutubeTest.testPlayerBytes',
       # crbug.com/109035
       '-youtube.YoutubeTest.testPlayerResolution',
     ],
 
     'linux': [  # linux != chromeos
+      'test_clean_exit',
       # ===========================
       # Permanently-disabled tests.
       # ===========================
       '-browser.BrowserTest.testWindowResize',  # Details at: crbug.com/44963
       # crbug.com/119110
       '-https.SSLTest.testSSLCertAuthorityOK',
       # crbug.com/104206
       '-notifications.NotificationsTest.testKillNotificationProcess',
       # Several omnibox tests do not show omnibox results when run
       # under virtual X on linux.  The CONTINUOUS suite runs under virtual X
@@ skipping 461 matching lines @@
 
   # HTML5 media performance tests.
   'AV_PERF': {
      'linux': [
        'media.media_constrained_network_perf',
        'media.media_jerky',
        'media.media_stat_perf',
      ],
   },
 }