[Sync] Start up immediately when entering the sync setup UI.

components/browser_sync/browser/profile_sync_service.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 "components/browser_sync/browser/profile_sync_service.h"
 
 #include <stddef.h>
 #include <cstddef>
 #include <map>
 #include <utility>
@@ skipping 1462 matching lines @@
 
 bool ProfileSyncService::IsFirstSetupInProgress() const {
   return !IsFirstSetupComplete() && startup_controller_->IsSetupInProgress();
 }
 
 void ProfileSyncService::SetSetupInProgress(bool setup_in_progress) {
   // This method is a no-op if |setup_in_progress_| remains unchanged.
   if (startup_controller_->IsSetupInProgress() == setup_in_progress)
     return;
 
-  startup_controller_->set_setup_in_progress(setup_in_progress);
+  startup_controller_->SetSetupInProgress(setup_in_progress);
   if (!setup_in_progress && IsBackendInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }
 
 bool ProfileSyncService::IsSyncAllowed() const {
   return IsSyncAllowedByFlag() && !IsManaged() && IsSyncAllowedByPlatform();
 }
 
 bool ProfileSyncService::IsSyncActive() const {
@@ skipping 956 matching lines @@
 }
 
 std::string ProfileSyncService::unrecoverable_error_message() const {
   return unrecoverable_error_message_;
 }
 
 tracked_objects::Location ProfileSyncService::unrecoverable_error_location()
     const {
   return unrecoverable_error_location_;
 }