Revert of Move base/prefs to components/prefs

components/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/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/webrtc.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 45 matching lines @@
     "//components/dom_distiller/core:unit_tests",
     "//components/flags_ui:unit_tests",
     "//components/google/core/browser:unit_tests",
     "//components/keyed_service/core:unit_tests",
     "//components/leveldb_proto:unit_tests",
     "//components/metrics:unit_tests",
     "//components/net_log:unit_tests",
     "//components/network_time:unit_tests",
     "//components/open_from_clipboard:unit_tests",
     "//components/os_crypt:unit_tests",
-    "//components/prefs:unit_tests",
     "//components/proxy_config:unit_tests",
     "//components/security_state:unit_tests",
     "//components/sessions:unit_tests",
     "//components/suggestions:unit_tests",
     "//components/syncable_prefs:unit_tests",
     "//components/translate/core/browser:unit_tests",
     "//components/translate/core/common:unit_tests",
     "//components/translate/core/language_detection:unit_tests",
     "//components/undo:unit_tests",
     "//components/update_client:unit_tests",
@@ skipping 374 matching lines @@
   if (!is_ios) {
     deps += [
       "//base",
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
     ]
   }
 }