Deprecate NonThreadSafe in components/bookmarks in favor of SequenceChecker.

components/bookmarks/browser/startup_task_runner_service.cc

 // Copyright (c) 2013 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/bookmarks/browser/startup_task_runner_service.h"
 
 #include "base/deferred_sequenced_task_runner.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
 
 namespace bookmarks {
 
 StartupTaskRunnerService::StartupTaskRunnerService(
     const scoped_refptr<base::SequencedTaskRunner>& io_task_runner)
     : io_task_runner_(io_task_runner) {
   DCHECK(io_task_runner_);
 }
 
 StartupTaskRunnerService::~StartupTaskRunnerService() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 }
 
 scoped_refptr<base::DeferredSequencedTaskRunner>
     StartupTaskRunnerService::GetBookmarkTaskRunner() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   if (!bookmark_task_runner_) {
     bookmark_task_runner_ =
         new base::DeferredSequencedTaskRunner(io_task_runner_);
   }
   return bookmark_task_runner_;
 }
 
 void StartupTaskRunnerService::StartDeferredTaskRunners() {
   GetBookmarkTaskRunner()->Start();
 }
 
 }  // namespace bookmarks