[sync] Display an error when sync settings aren't confirmed

components/browser_sync/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/profile_sync_service.h"
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <map>
@@ skipping 768 matching lines @@
 }
 
 void ProfileSyncService::SetFirstSetupComplete() {
   DCHECK(thread_checker_.CalledOnValidThread());
   sync_prefs_.SetFirstSetupComplete();
   if (IsEngineInitialized()) {
     ReconfigureDatatypeManager();
   }
 }
 
+bool ProfileSyncService::IsSyncConfirmationNeeded() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return !IsFirstSetupInProgress() && !IsFirstSetupComplete() &&
+         IsSyncRequested();
+}
+
 void ProfileSyncService::UpdateLastSyncedTime() {
   sync_prefs_.SetLastSyncedTime(base::Time::Now());
 }
 
 void ProfileSyncService::NotifySyncCycleCompleted() {
   for (auto& observer : observers_)
     observer.OnSyncCycleCompleted(this);
 }
 
 void ProfileSyncService::NotifyForeignSessionUpdated() {
@@ skipping 1612 matching lines @@
     return;
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsEngineInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }
 }  // namespace browser_sync