Introduce //components/user_prefs, use to eliminate c/b/prefs dependency in Autofill.

chrome/browser/profiles/gaia_info_update_service_factory.cc

 // Copyright (c) 2012 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/profiles/gaia_info_update_service_factory.h"
 
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/profiles/gaia_info_update_service.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 
 GAIAInfoUpdateServiceFactory::GAIAInfoUpdateServiceFactory()
     : ProfileKeyedServiceFactory("GAIAInfoUpdateService",
                                  ProfileDependencyManager::GetInstance()) {
 }
 
 GAIAInfoUpdateServiceFactory::~GAIAInfoUpdateServiceFactory() {}
 
 // static
 GAIAInfoUpdateService* GAIAInfoUpdateServiceFactory::GetForProfile(
@@ skipping 18 matching lines @@
     PrefRegistrySyncable* prefs) {
   prefs->RegisterInt64Pref(prefs::kProfileGAIAInfoUpdateTime, 0,
                            PrefRegistrySyncable::UNSYNCABLE_PREF);
   prefs->RegisterStringPref(prefs::kProfileGAIAInfoPictureURL, "",
                             PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 bool GAIAInfoUpdateServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }