Deprecate NonThreadSafe in components/sync in favor of SequenceChecker.

components/sync/device_info/local_device_info_provider_impl.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DEVICE_INFO_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_
 #define COMPONENTS_SYNC_DEVICE_INFO_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "components/sync/device_info/device_info.h"
 #include "components/sync/device_info/local_device_info_provider.h"
 #include "components/version_info/version_info.h"
 
 namespace syncer {
 
-class LocalDeviceInfoProviderImpl : public LocalDeviceInfoProvider,
-                                    public base::NonThreadSafe {
+class LocalDeviceInfoProviderImpl : public LocalDeviceInfoProvider {
  public:
   LocalDeviceInfoProviderImpl(version_info::Channel channel,
                               const std::string& version,
                               bool is_tablet);
   ~LocalDeviceInfoProviderImpl() override;
 
   // LocalDeviceInfoProvider implementation.
   const DeviceInfo* GetLocalDeviceInfo() const override;
   std::string GetSyncUserAgent() const override;
   std::string GetLocalSyncCacheGUID() const override;
@@ skipping 16 matching lines @@
   // The version string for the current client.
   const std::string version_;
 
   // Whether this device has a tablet form factor (only used on Android
   // devices).
   const bool is_tablet_;
 
   std::string cache_guid_;
   std::unique_ptr<DeviceInfo> local_device_info_;
   base::CallbackList<void(void)> callback_list_;
+
+  SEQUENCE_CHECKER(sequence_checker_);
+
   base::WeakPtrFactory<LocalDeviceInfoProviderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalDeviceInfoProviderImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DEVICE_INFO_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_