Update GN build files for new prefs location.

components/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/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/webrtc.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 401 matching lines @@
       ":components_browsertests_java",
       ":components_browsertests_manifest",
     ]
   }
 
   if (is_linux) {
     # content_extractor_browsertest is a standalone content extraction tool built as
     # a MANUAL component_browsertest.
     sources += [ "dom_distiller/standalone/content_extractor_browsertest.cc" ]
     deps += [
-      "//base:prefs_test_support",
       "//components/leveldb_proto",
       "//components/pref_registry:test_support",
+      "//components/prefs:test_support",
     ]
   }
 
   if (enable_basic_printing || enable_print_preview) {
     sources += [ "printing/test/print_web_view_helper_browsertest.cc" ]
     deps += [ "//components/printing/test:test_support" ]
   }
 }
 
 test("components_perftests") {
@@ skipping 16 matching lines @@
   if (!is_ios) {
     deps += [
       "//base",
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
     ]
   }
 }