[Sync] Refactoring of sync integration test checkers to remove boilerplate await methods.

chrome/browser/sync/test/integration/updated_progress_marker_checker.cc

 // Copyright 2014 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/sync/test/integration/updated_progress_marker_checker.h"
 
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/sync/engine/cycle/sync_cycle_snapshot.h"
 
 UpdatedProgressMarkerChecker::UpdatedProgressMarkerChecker(
     browser_sync::ProfileSyncService* service)
     : SingleClientStatusChangeChecker(service) {}
 
-UpdatedProgressMarkerChecker::~UpdatedProgressMarkerChecker() {}
-
 bool UpdatedProgressMarkerChecker::IsExitConditionSatisfied() {
   // Checks to see if our self-notify sync cycle has completed and
   // there's nothing to commit.
   //
   // If we assume that no one else is committing at this time and that the
   // current client did not commit anything in its previous sync cycle, then
   // this client has the latest progress markers.
   //
   // The !service()->HasUnsyncedItems() check makes sure that we have nothing to
   // commit.
@@ skipping 11 matching lines @@
   // ProfileSyncService.  If we're calling this right after the sync session
   // completes, then the snapshot is much more likely to be up to date.
   const syncer::SyncCycleSnapshot& snap = service()->GetLastCycleSnapshot();
   return snap.model_neutral_state().num_successful_commits == 0 &&
          service()->IsSyncActive() && !service()->HasUnsyncedItems();
 }
 
 std::string UpdatedProgressMarkerChecker::GetDebugMessage() const {
   return "Waiting for progress markers";
 }