Don't force non-session only cookies to be session only cookies, instead delete on shutdown

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 1359 matching lines @@
         'browser/native_window_notification_source.h',
         'browser/net/chrome_cookie_notification_details.h',
         'browser/net/chrome_fraudulent_certificate_reporter.cc',
         'browser/net/chrome_fraudulent_certificate_reporter.h',
         'browser/net/chrome_net_log.cc',
         'browser/net/chrome_net_log.h',
         'browser/net/chrome_network_delegate.cc',
         'browser/net/chrome_network_delegate.h',
         'browser/net/chrome_url_request_context.cc',
         'browser/net/chrome_url_request_context.h',
+        'browser/net/clear_on_exit_policy.cc',
+        'browser/net/clear_on_exit_policy.h',
         'browser/net/connect_interceptor.cc',
         'browser/net/connect_interceptor.h',
         'browser/net/connection_tester.cc',
         'browser/net/connection_tester.h',
         'browser/net/crl_set_fetcher.cc',
         'browser/net/crl_set_fetcher.h',
         'browser/net/gaia/gaia_oauth_consumer.h',
         'browser/net/gaia/gaia_oauth_fetcher.cc',
         'browser/net/gaia/gaia_oauth_fetcher.h',
         'browser/net/load_timing_observer.cc',
@@ skipping 3731 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }