Add login url to captive portal interstitial.

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 374 matching lines @@
       'browser/services/gcm/fake_gcm_profile_service.h',
       'browser/services/gcm/push_messaging_browsertest.cc',
       'browser/sessions/better_session_restore_browsertest.cc',
       'browser/sessions/persistent_tab_restore_service_browsertest.cc',
       'browser/sessions/session_restore_browsertest.cc',
       'browser/sessions/session_restore_browsertest_chromeos.cc',
       'browser/sessions/tab_restore_browsertest.cc',
       'browser/signin/easy_unlock_service_browsertest_chromeos.cc',
       'browser/signin/signin_browsertest.cc',
       'browser/spellchecker/spellcheck_service_browsertest.cc',
+      'browser/ssl/captive_portal_blocking_page_browsertest.cc',
       'browser/ssl/chrome_ssl_host_state_delegate_test.cc',
       'browser/ssl/ssl_browser_tests.cc',
       'browser/ssl/ssl_client_certificate_selector_test.cc',
       'browser/ssl/ssl_client_certificate_selector_test.h',
       'browser/sync_file_system/mock_local_change_processor.cc',
       'browser/sync_file_system/mock_local_change_processor.h',
       'browser/sync_file_system/mock_remote_file_sync_service.cc',
       'browser/sync_file_system/mock_remote_file_sync_service.h',
       'browser/tab_contents/view_source_browsertest.cc',
       'browser/task_manager/task_manager_browsertest.cc',
@@ skipping 2838 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }