[Sync] Don't start up sync when FirstSetupCompleted is false and no setup in progress

components/browser_sync/browser/profile_sync_service_unittest.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 <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 397 matching lines @@
   IssueTestTokens();
   CreateService(ProfileSyncService::AUTO_START);
   ExpectDataTypeManagerCreation(1, GetDefaultConfigureCalledCallback());
   ExpectSyncBackendHostCreation(1);
   InitializeForNthSync();
   EXPECT_FALSE(service()->IsManaged());
   EXPECT_TRUE(service()->IsSyncActive());
 }
 
 // Verify that an initialization where first setup is not complete does not
-// purge preferences and/or the directory.
+// start up the backend.
 TEST_F(ProfileSyncServiceTest, NeedsConfirmation) {
   prefs()->SetManagedPref(sync_driver::prefs::kSyncManaged,
                           new base::FundamentalValue(false));
   IssueTestTokens();
   CreateService(ProfileSyncService::MANUAL_START);
-  ExpectSyncBackendHostCreation(1);
   sync_driver::SyncPrefs sync_prefs(prefs());
   base::Time now = base::Time::Now();
   sync_prefs.SetLastSyncedTime(now);
   sync_prefs.SetKeepEverythingSynced(true);
   service()->Initialize();
   EXPECT_FALSE(service()->IsSyncActive());
 
   // The last sync time shouldn't be cleared.
   // TODO(zea): figure out a way to check that the directory itself wasn't
   // cleared.
@@ skipping 495 matching lines @@
 // dereferenced in OnSyncCycleCompleted. The fix is to use find() to check if
 // entry for sessions exists in map.
 TEST_F(ProfileSyncServiceTest, ValidPointersInDTCMap) {
   CreateService(ProfileSyncService::AUTO_START);
   service()->OnSessionRestoreComplete();
   service()->OnSyncCycleCompleted();
 }
 
 }  // namespace
 }  // namespace browser_sync