components: Extract pref_registry component out of user_prefs.

chrome/browser/extensions/external_component_loader.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/extensions/external_component_loader.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/bookmarks/enhanced_bookmarks_features.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/external_provider_impl.h"
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/pref_names.h"
+#include "components/pref_registry/pref_registry_syncable.h"
 #include "components/sync_driver/pref_names.h"
-#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace extensions {
 
 ExternalComponentLoader::ExternalComponentLoader(Profile* profile)
     : profile_(profile) {
 }
 
 ExternalComponentLoader::~ExternalComponentLoader() {}
 
@@ skipping 57 matching lines @@
           sync_driver::prefs::kEnhancedBookmarksExperimentEnabled));
   if (bookmarks_experiment_state_before != bookmarks_experiment_state) {
     UpdateBookmarksExperiment(g_browser_process->local_state(),
                               bookmarks_experiment_state);
   }
 
   LoadFinished();
 }
 
 }  // namespace extensions