Revert of Delete base/prefs and update callers to use components.

ios/chrome/browser/sync/sync_setup_service.cc

 // Copyright 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 "ios/chrome/browser/sync/sync_setup_service.h"
 
 #include <stdio.h>
 
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
-#include "components/prefs/pref_service.h"
+#include "base/prefs/pref_service.h"
 #include "components/sync_driver/sync_prefs.h"
 #include "components/sync_driver/sync_service.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "ios/chrome/browser/pref_names.h"
 #include "ios/public/provider/chrome/browser/browser_state/chrome_browser_state.h"
 #include "net/base/network_change_notifier.h"
 #include "sync/internal_api/public/base/stop_source.h"
 #include "sync/protocol/sync_protocol_error.h"
 
 namespace {
@@ skipping 172 matching lines @@
     bool sync_enabled) {
   sync_service_->SetSetupInProgress(true);
   if (sync_enabled) {
     sync_service_->RequestStart();
   } else {
     UMA_HISTOGRAM_ENUMERATION("Sync.StopSource", syncer::CHROME_SYNC_SETTINGS,
                               syncer::STOP_SOURCE_LIMIT);
     sync_service_->RequestStop(sync_driver::SyncService::KEEP_DATA);
   }
 }