Update GN build files for new prefs location.

components/omnibox/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.
 
 import("//third_party/protobuf/proto_library.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
@@ skipping 92 matching lines @@
   ]
 
   public_deps = [
     "//components/history/core/browser",
     "//components/metrics/proto",
   ]
   deps = [
     ":in_memory_url_index_cache_proto",
     "//base",
     "//base:i18n",
-    "//base:prefs",
     "//components/bookmarks/browser",
     "//components/data_use_measurement/core",
     "//components/keyed_service/core",
     "//components/metrics",
     "//components/omnibox/common",
     "//components/open_from_clipboard",
     "//components/pref_registry",
+    "//components/prefs",
     "//components/query_parser",
     "//components/resources",
     "//components/search",
     "//components/search_engines",
     "//components/sessions",
     "//components/strings",
     "//components/toolbar",
     "//components/url_formatter",
     "//components/variations",
     "//components/variations/net",
@@ skipping 67 matching lines @@
     "scored_history_match_unittest.cc",
     "shortcuts_database_unittest.cc",
     "suggestion_answer_unittest.cc",
     "zero_suggest_provider_unittest.cc",
   ]
 
   deps = [
     ":browser",
     ":test_support",
     "//base",
-    "//base:prefs",
-    "//base:prefs_test_support",
     "//base/test:test_support",
     "//components/bookmarks/browser",
     "//components/bookmarks/test",
     "//components/history/core/test",
     "//components/open_from_clipboard:test_support",
+    "//components/prefs:test_support",
     "//components/search",
     "//components/search_engines",
     "//components/url_formatter",
     "//components/variations",
     "//net:test_support",
     "//sql",
     "//sql:test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/base",
     "//url",
   ]
 }