Update GN build files for new prefs location.

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/chrome_tests.gni")
@@ skipping 66 matching lines @@
     "logging/win/mof_data_parser.cc",
     "logging/win/mof_data_parser.h",
     "logging/win/test_log_collector.cc",
     "logging/win/test_log_collector.h",
   ]
 
   configs += [ "//build/config:precompiled_headers" ]
 
   # New deps should go in the non-iOS section below.
   public_deps = [
-    "//base:prefs_test_support",
     "//base/test:test_support",
     "//chrome:resources",
     "//chrome:strings",
     "//chrome/app:test_support",
 
     #"//chrome/app/theme:theme_resources",
     "//chrome/browser:test_support",
     "//chrome/common:test_support",
     "//chrome/renderer:test_support",
     "//components/bookmarks/test",
     "//components/gcm_driver:test_support",
     "//components/gcm_driver/instance_id:test_support",
     "//components/history/core/test:test",
     "//components/metrics:test_support",
     "//components/omnibox/browser:test_support",
     "//components/password_manager/core/browser:test_support",
     "//components/pref_registry:test_support",
+    "//components/prefs:test_support",
     "//components/rappor:test_support",
     "//components/search_engines:test_support",
     "//components/signin/core/browser:test_support",
     "//components/sync_driver:test_support",
     "//components/sync_sessions:test_support",
     "//components/syncable_prefs:test_support",
     "//components/toolbar:test_support",
     "//components/ui/zoom:test_support",
     "//components/update_client:test_support",
     "//content/public/app:both",
@@ skipping 2108 matching lines @@
 if (is_android) {
   android_library("unit_tests_java") {
     DEPRECATED_java_in_dir = "//chrome/test/android/unit_tests_apk/src"
     deps = [
       "//base:base_java",
       "//chrome/android:chrome_java",
       "//content/public/android:content_java",
     ]
   }
 }