Update GN build files for new prefs location.

components/arc/BUILD.gn

 # Copyright 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("//mojo/public/tools/bindings/mojom.gni")
 
 static_library("arc") {
   sources = [
     "arc_bridge_bootstrap.cc",
     "arc_bridge_bootstrap.h",
@@ skipping 17 matching lines @@
     "input/arc_input_bridge.cc",
     "input/arc_input_bridge.h",
     "net/arc_net_host_impl.cc",
     "net/arc_net_host_impl.h",
     "power/arc_power_bridge.cc",
     "power/arc_power_bridge.h",
   ]
 
   deps = [
     "//base",
-    "//base:prefs",
     "//chromeos",
     "//chromeos:power_manager_proto",
     "//components/onc",
+    "//components/prefs",
     "//components/signin/core/account_id",
     "//google_apis",
     "//ipc:ipc",
     "//ipc/mojo:mojo",
     "//third_party/mojo/src/mojo/edk/system",
     "//ui/arc",
     "//ui/aura",
     "//ui/base:base",
     "//ui/base/ime",
     "//ui/events",
@@ skipping 58 matching lines @@
     "//mojo/public/cpp/environment:environment",
     "//mojo/public/cpp/system:system",
     "//testing/gtest",
     "//ui/aura",
     "//ui/base:test_support",
     "//ui/base/ime",
     "//ui/events",
     "//ui/events:dom_keycode_converter",
   ]
 }