Eliminate quit closure argument to embedded service factories

services/file/file_service.cc

 // 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.
 
 #include "services/file/file_service.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "components/filesystem/lock_table.h"
@@ skipping 55 matching lines @@
 
   // Variables that are only accessible on the |leveldb_service_runner_| thread.
   std::unique_ptr<leveldb::mojom::LevelDBService> leveldb_service_;
   mojo::BindingSet<leveldb::mojom::LevelDBService> leveldb_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(LevelDBServiceObjects);
 };
 
 std::unique_ptr<service_manager::Service> CreateFileService(
     scoped_refptr<base::SingleThreadTaskRunner> file_service_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner,
-    const base::Closure& quit_closure) {
+    scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner) {
   return base::MakeUnique<FileService>(std::move(file_service_runner),
                                        std::move(leveldb_service_runner));
 }
 
 FileService::FileService(
     scoped_refptr<base::SingleThreadTaskRunner> file_service_runner,
     scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner)
     : file_service_runner_(std::move(file_service_runner)),
       leveldb_service_runner_(std::move(leveldb_service_runner)) {}
 
@@ skipping 29 matching lines @@
                          leveldb::mojom::LevelDBServiceRequest request) {
   leveldb_service_runner_->PostTask(
       FROM_HERE,
       base::Bind(
           &FileService::LevelDBServiceObjects::OnLevelDBServiceRequest,
           leveldb_objects_->AsWeakPtr(), remote_identity,
           base::Passed(&request)));
 }
 
 }  // namespace user_service