Update chrome for new prefs location.

chrome/browser/signin/cross_device_promo.cc

 // 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.
 
 #include "chrome/browser/signin/cross_device_promo.h"
 
 #include <stdint.h>
 
 #include "base/metrics/histogram_macros.h"
-#include "base/prefs/pref_service.h"
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "chrome/common/pref_names.h"
+#include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/signin_client.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_metrics.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace {
 
 // Helper method to set a |local_parameter| to the result of fetching a
 // |variation_parameter| from the variation seed, converting to an int, and then
 // applying |conversion| to create a TimeDelta. Returns false if the
@@ skipping 424 matching lines @@
   device_activity_fetcher_->Start();
 }
 
 void CrossDevicePromo::RegisterForCookieChanges() {
   cookie_manager_service_->AddObserver(this);
 }
 
 void CrossDevicePromo::UnregisterForCookieChanges() {
   cookie_manager_service_->RemoveObserver(this);
 }