Add a chrome://interstitials page.

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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 1464 matching lines @@
         'browser/ui/webui/downloads_ui_browsertest.js',
         'browser/ui/webui/extensions/chromeos/kiosk_apps_browsertest.js',
         'browser/ui/webui/extensions/extension_settings_browsertest.cc',
         'browser/ui/webui/extensions/extension_settings_browsertest.h',
         'browser/ui/webui/extensions/extension_settings_browsertest.js',
         'browser/ui/webui/help/help_browsertest.js',
         'browser/ui/webui/identity_internals_ui_browsertest.cc',
         'browser/ui/webui/identity_internals_ui_browsertest.h',
         'browser/ui/webui/identity_internals_ui_browsertest.js',
         'browser/ui/webui/inspect_ui_browsertest.cc',
+        'browser/ui/webui/interstitials/interstitial_ui_browsertest.cc',
         'browser/ui/webui/net_internals/net_internals_ui_browsertest.cc',
         'browser/ui/webui/net_internals/net_internals_ui_browsertest.h',
         'browser/ui/webui/ntp/most_visited_browsertest.cc',
         'browser/ui/webui/ntp/new_tab_page_sync_handler_browsertest.cc',
         'browser/ui/webui/ntp/new_tab_ui_browsertest.cc',
         'browser/ui/webui/options/autofill_options_browsertest.js',
         'browser/ui/webui/options/browser_options_browsertest.js',
         'browser/ui/webui/options/certificate_manager_browsertest.cc',
         'browser/ui/webui/options/certificate_manager_browsertest.js',
         'browser/ui/webui/options/clear_browser_data_browsertest.cc',
@@ skipping 1506 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }