Replace c/b/nss_context by a KeyedService.

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 453 matching lines @@
       'browser/media/wv_test_license_server_config.h',
       'browser/media_galleries/fileapi/iapps_finder_impl_win_browsertest.cc',
       'browser/media_galleries/fileapi/media_file_validator_browsertest.cc',
       'browser/media_galleries/media_galleries_dialog_controller_mock.cc',
       'browser/media_galleries/media_galleries_dialog_controller_mock.h',
       'browser/metrics/metrics_service_browsertest.cc',
       'browser/net/cookie_policy_browsertest.cc',
       'browser/net/dns_probe_browsertest.cc',
       'browser/net/ftp_browsertest.cc',
       'browser/net/load_timing_browsertest.cc',
-      'browser/net/nss_context_chromeos_browsertest.cc',
       'browser/net/predictor_browsertest.cc',
       'browser/net/proxy_browsertest.cc',
       'browser/net/sdch_browsertest.cc',
       'browser/net/websocket_browsertest.cc',
       'browser/notifications/login_state_notification_blocker_chromeos_browsertest.cc',
       'browser/notifications/message_center_notifications_browsertest.cc',
       'browser/password_manager/password_manager_browsertest.cc',
       'browser/plugins/npapi_infobar_browsertest.cc',
       'browser/policy/cloud/cloud_policy_browsertest.cc',
       'browser/policy/cloud/cloud_policy_manager_browsertest.cc',
@@ skipping 2714 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }