Make extensions DSE persistent in browser prefs

chrome/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 1425 matching lines @@
       "../browser/extensions/api/page_capture/page_capture_apitest.cc",
       "../browser/extensions/api/passwords_private/passwords_private_apitest.cc",
       "../browser/extensions/api/permissions/permissions_apitest.cc",
       "../browser/extensions/api/platform_keys/platform_keys_apitest_nss.cc",
       "../browser/extensions/api/preference/preference_apitest.cc",
       "../browser/extensions/api/processes/processes_apitest.cc",
       "../browser/extensions/api/proxy/proxy_apitest.cc",
       "../browser/extensions/api/resources_private/resources_private_apitest.cc",
       "../browser/extensions/api/screenlock_private/screenlock_private_apitest.cc",
       "../browser/extensions/api/sessions/sessions_apitest.cc",
+      "../browser/extensions/api/settings_overrides/default_search_manager_browsertest.cc",
       "../browser/extensions/api/settings_overrides/settings_overrides_browsertest.cc",
       "../browser/extensions/api/settings_private/settings_private_apitest.cc",
       "../browser/extensions/api/socket/socket_apitest.cc",
       "../browser/extensions/api/storage/settings_apitest.cc",
       "../browser/extensions/api/streams_private/streams_private_apitest.cc",
       "../browser/extensions/api/sync_file_system/sync_file_system_apitest.cc",
       "../browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc",
       "../browser/extensions/api/system_indicator/system_indicator_apitest.cc",
       "../browser/extensions/api/system_private/system_private_apitest.cc",
       "../browser/extensions/api/tab_capture/tab_capture_apitest.cc",
@@ skipping 3649 matching lines @@
       "touch_hud",
       "ui",
     ]
 
     if (is_linux && !is_android) {
       deps += [ "//components/font_service:manifest" ]
       packaged_services += [ "font_service" ]
     }
   }
 }