Update GN build files for new prefs location.

components/drive/BUILD.gn

 # Copyright (c) 2015 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")
 
 source_set("drive") {
   sources = [
     "drive_api_util.cc",
     "drive_api_util.h",
@@ skipping 32 matching lines @@
     "resource_metadata_storage.cc",
     "resource_metadata_storage.h",
     "service/drive_api_service.cc",
     "service/drive_api_service.h",
     "service/drive_service_interface.cc",
     "service/drive_service_interface.h",
   ]
   deps = [
     "//base",
     "//base:i18n",
-    "//base:prefs",
     "//components/invalidation/public",
     "//components/keyed_service/core",
+    "//components/prefs",
 
     # TODO(lukasza): Remove this dependency (see DEPS file for more info).
     "//content/public/browser",
     "//google_apis:google_apis",
     "//net:net",
     "//third_party/cacheinvalidation",
     "//third_party/leveldatabase",
     "//third_party/re2",
   ]
   public_deps = [
@@ skipping 56 matching lines @@
     "sync/entry_update_performer.h",
     "sync/remove_performer.cc",
     "sync/remove_performer.h",
     "sync_client.cc",
     "sync_client.h",
   ]
   deps = [
     ":drive",
     "//base",
     "//base:i18n",
-    "//base:prefs",
+    "//components/prefs",
     "//google_apis:google_apis",
     "//net:net",
   ]
   public_deps = [
     ":proto",
   ]
 }
 
 proto_library("proto") {
   sources = [
     "drive.proto",
   ]
 }
 
 source_set("test_support") {
   testonly = true
   sources = [
     "service/dummy_drive_service.cc",
     "service/dummy_drive_service.h",
     "service/fake_drive_service.cc",
     "service/fake_drive_service.h",
     "service/test_util.cc",
     "service/test_util.h",
   ]
   deps = [
     ":drive",
     ":proto",
     "//base",
-    "//base:prefs_test_support",
+    "//components/prefs:test_support",
     "//content/test:test_support",
     "//google_apis:test_support",
     "//net:net",
   ]
 }
 
 source_set("test_support_chromeos") {
   testonly = true
   sources = [
     "drive_test_util.cc",
     "drive_test_util.h",
     "dummy_file_system.cc",
     "dummy_file_system.h",
     "fake_file_system.cc",
     "fake_file_system.h",
     "fake_free_disk_space_getter.cc",
     "fake_free_disk_space_getter.h",
   ]
   deps = [
     ":drive",
     ":drive_chromeos",
     ":proto",
     "//base",
-    "//base:prefs_test_support",
+    "//components/prefs:test_support",
     "//content/test:test_support",
     "//google_apis:test_support",
   ]
 }