Change single-interface mojo bindings to use SequencedTaskRunner.

services/file/file_service.h

 // Copyright 2016 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 SERVICES_FILE_FILE_SERVICE_H_
 #define SERVICES_FILE_FILE_SERVICE_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "components/filesystem/lock_table.h"
 #include "components/leveldb/public/interfaces/leveldb.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/file/public/interfaces/file_system.mojom.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
 
+namespace base {
+class SingleThreadTaskRunner;
+}
+
 namespace file {
 
 std::unique_ptr<service_manager::Service> CreateFileService(
     scoped_refptr<base::SingleThreadTaskRunner> file_service_runner,
     scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner);
 
 class FileService
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::FileSystem>,
       public service_manager::InterfaceFactory<leveldb::mojom::LevelDBService> {
@@ skipping 29 matching lines @@
 
   class LevelDBServiceObjects;
   std::unique_ptr<LevelDBServiceObjects> leveldb_objects_;
 
   DISALLOW_COPY_AND_ASSIGN(FileService);
 };
 
 }  // namespace file
 
 #endif  // SERVICES_FILE_FILE_SERVICE_H_