Add integration browser tests for settings hardening.

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 1297 matching lines @@
         'browser/policy/cloud/device_management_service_browsertest.cc',
         'browser/policy/cloud/test_request_interceptor.cc',
         'browser/policy/cloud/test_request_interceptor.h',
         'browser/policy/policy_browsertest.cc',
         'browser/policy/policy_prefs_browsertest.cc',
         'browser/plugins/npapi_infobar_browsertest.cc',
         'browser/prefetch/prefetch_browsertest.cc',
         'browser/prefs/pref_functional_browsertest.cc',
         'browser/prefs/pref_service_browsertest.cc',
         'browser/prefs/synced_pref_change_registrar_browsertest.cc',
+        'browser/prefs/tracked/pref_hash_browsertest.cc',
         'browser/prerender/prerender_browsertest.cc',
         'browser/printing/cloud_print/test/cloud_print_policy_browsertest.cc',
         'browser/printing/cloud_print/test/cloud_print_proxy_process_browsertest.cc',
         'browser/printing/print_preview_dialog_controller_browsertest.cc',
         'browser/printing/print_preview_pdf_generated_browsertest.cc',
         'browser/process_singleton_browsertest.cc',
         'browser/profiles/host_zoom_map_browsertest.cc',
         'browser/profiles/profile_browsertest.cc',
         'browser/profiles/profile_list_desktop_browsertest.cc',
         'browser/profiles/profile_manager_browsertest.cc',
@@ skipping 1678 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }