Update GN build files for new prefs location.

components/password_manager/content/browser/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.
 
 source_set("browser") {
   sources = [
     "bad_message.cc",
     "bad_message.h",
     "content_password_manager_driver.cc",
     "content_password_manager_driver.h",
     "content_password_manager_driver_factory.cc",
     "content_password_manager_driver_factory.h",
     "credential_manager_dispatcher.cc",
     "credential_manager_dispatcher.h",
     "password_manager_internals_service_factory.cc",
     "password_manager_internals_service_factory.h",
   ]
 
   public_deps = [
     "//base",
-    "//base:prefs",
     "//components/autofill/content/browser",
     "//components/autofill/content/common",
     "//components/autofill/core/common",
     "//components/keyed_service/content",
     "//components/password_manager/content/common",
     "//components/password_manager/core/browser",
     "//components/password_manager/core/common",
+    "//components/prefs",
     "//content/public/browser",
     "//content/public/common",
     "//ipc",
     "//net",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "content_password_manager_driver_unittest.cc",
     "credential_manager_dispatcher_unittest.cc",
   ]
   deps = [
     ":browser",
-    "//base:prefs_test_support",
     "//components/autofill/core/browser:test_support",
     "//components/password_manager/core/browser:test_support",
+    "//components/prefs:test_support",
     "//content/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }