Replace deprecated base::NonThreadSafe in components/signin in favor of SequenceChecker.

components/signin/core/browser/refresh_token_annotation_request.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_SIGNIN_CORE_BROWSER_REFRESH_TOKEN_ANNOTATION_REQUEST_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_REFRESH_TOKEN_ANNOTATION_REQUEST_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "google_apis/gaia/oauth2_api_call_flow.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
 class PrefService;
 class SigninClient;
 
 // RefreshTokenAnnotationRequest sends request to IssueToken endpoint with
 // device_id to backfill device info for refresh tokens issued pre-M38. It is
 // important to keep server QPS low therefore this request is sent on average
 // once per 10 days per profile.
 // This code shold be removed once majority of refresh tokens are updated.
-class RefreshTokenAnnotationRequest : public base::NonThreadSafe,
-                                      public OAuth2TokenService::Consumer,
+class RefreshTokenAnnotationRequest : public OAuth2TokenService::Consumer,
                                       public OAuth2ApiCallFlow {
  public:
   ~RefreshTokenAnnotationRequest() override;
 
   // Checks if it's time to send IssueToken request. If it is then schedule
   // delay for next request and start request flow.
   //
   // If request is started then return value is scoped_ptr to request. Callback
   // will be posted on current thread when request flow is finished one way or
   // another. Callback's purpose is to delete request after it is done.
@@ skipping 40 matching lines @@
                           const std::string& account_id);
 
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   std::string product_version_;
   std::string device_id_;
   std::string client_id_;
   base::Closure request_callback_;
 
   std::unique_ptr<OAuth2TokenService::Request> access_token_request_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(RefreshTokenAnnotationRequest);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_REFRESH_TOKEN_ANNOTATION_REQUEST_H_