Deprecate NonThreadSafe in components/sync in favor of SequenceChecker.

components/sync/engine_impl/sync_scheduler_impl.h

 // Copyright 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.
 
 #ifndef COMPONENTS_SYNC_ENGINE_IMPL_SYNC_SCHEDULER_IMPL_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_SYNC_SCHEDULER_IMPL_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/cancelable_callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "components/sync/engine/polling_constants.h"
 #include "components/sync/engine_impl/cycle/nudge_tracker.h"
 #include "components/sync/engine_impl/cycle/sync_cycle.h"
 #include "components/sync/engine_impl/cycle/sync_cycle_context.h"
 #include "components/sync/engine_impl/net/server_connection_manager.h"
 #include "components/sync/engine_impl/nudge_source.h"
 #include "components/sync/engine_impl/sync_scheduler.h"
 #include "components/sync/engine_impl/syncer.h"
 
 namespace syncer {
 
 class BackoffDelayProvider;
 struct ModelNeutralState;
 
-class SyncSchedulerImpl : public SyncScheduler, public base::NonThreadSafe {
+class SyncSchedulerImpl : public SyncScheduler {
  public:
   // |name| is a display string to identify the syncer thread.  Takes
   // |ownership of |syncer| and |delay_provider|.
   SyncSchedulerImpl(const std::string& name,
                     BackoffDelayProvider* delay_provider,
                     SyncCycleContext* context,
                     Syncer* syncer,
                     bool ignore_auth_credentials);
 
   // Calls Stop().
@@ skipping 241 matching lines @@
   // after NETWORK_UNAVAILABLE error).
   // It is reset back to NORMAL_PRIORITY on every call to TrySyncCycleJobImpl.
   JobPriority next_sync_cycle_job_priority_;
 
   // One-shot timer for scheduling GU retry according to delay set by server.
   base::OneShotTimer retry_timer_;
 
   // Dictates if the scheduler should wait for authentication to happen or not.
   bool ignore_auth_credentials_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   base::WeakPtrFactory<SyncSchedulerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncSchedulerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_SYNC_SCHEDULER_IMPL_H_