Migrate SequencedTaskRunnerHandle calls to TaskRunnerHandle calls.

components/safe_json/safe_json_parser_impl.h

 // Copyright 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.
 
 #ifndef COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_IMPL_H_
 #define COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_IMPL_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "components/safe_json/public/interfaces/safe_json.mojom.h"
 #include "components/safe_json/safe_json_parser.h"
 #include "content/public/browser/utility_process_host_client.h"
 
 namespace base {
 class ListValue;
-class SequencedTaskRunner;
+class TaskRunner;
 class Value;
 }
 
 namespace content {
 class UtilityProcessHost;
 }
 
 namespace IPC {
 class Message;
 }
@@ skipping 20 matching lines @@
 
   // SafeJsonParser implementation.
   void Start() override;
 
   // mojom::SafeJsonParser::Parse callback.
   void OnParseDone(const base::ListValue& wrapper, mojo::String error);
 
   const std::string unsafe_json_;
   SuccessCallback success_callback_;
   ErrorCallback error_callback_;
-  scoped_refptr<base::SequencedTaskRunner> caller_task_runner_;
+  scoped_refptr<base::TaskRunner> caller_task_runner_;
 
   std::unique_ptr<base::Value> parsed_json_;
   std::string error_;
 
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
 
   mojom::SafeJsonParserPtr service_;
 
   // To ensure the UtilityProcessHost and Mojo service are only accessed on the
   // IO thread.
   base::ThreadChecker io_thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeJsonParserImpl);
 };
 
 }  // namespace safe_json
 
 #endif  // COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_IMPL_H_