Deprecate NonThreadSafe in components/sync in favor of SequenceChecker.

components/sync/engine_impl/attachments/attachment_uploader_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_ENGINE_IMPL_ATTACHMENTS_ATTACHMENT_UPLOADER_IMPL_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_ATTACHMENTS_ATTACHMENT_UPLOADER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <unordered_map>
 
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/engine/attachments/attachment_uploader.h"
 #include "google_apis/gaia/oauth2_token_service_request.h"
 #include "net/url_request/url_request_context_getter.h"
 
 class GURL;
 
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace syncer {
 
 // An implementation of AttachmentUploader.
-class AttachmentUploaderImpl : public AttachmentUploader,
-                               public base::NonThreadSafe {
+class AttachmentUploaderImpl : public AttachmentUploader {
  public:
   // |sync_service_url| is the URL of the sync service.
   //
   // |url_request_context_getter| provides a URLRequestContext.
   //
   // |account_id| is the account id to use for uploads.
   //
   // |scopes| is the set of scopes to use for uploads.
   //
   // |token_service_provider| provides an OAuth2 token service.
@@ skipping 47 matching lines @@
   GURL sync_service_url_;
   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
   std::string account_id_;
   OAuth2TokenService::ScopeSet scopes_;
   scoped_refptr<OAuth2TokenServiceRequest::TokenServiceProvider>
       token_service_provider_;
   std::string raw_store_birthday_;
   StateMap state_map_;
   ModelType model_type_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   // Must be last data member.
   base::WeakPtrFactory<AttachmentUploaderImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AttachmentUploaderImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_ATTACHMENTS_ATTACHMENT_UPLOADER_IMPL_H_