Revert of Deletes mojo::Callback

services/user/user_shell_client.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/user/user_shell_client.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "components/filesystem/lock_table.h"
 #include "components/leveldb/leveldb_service_impl.h"
+#include "mojo/public/cpp/bindings/callback.h"
 #include "services/shell/public/cpp/connection.h"
 #include "services/user/user_id_map.h"
 #include "services/user/user_service.h"
 
 namespace user_service {
 
 class UserShellClient::UserServiceObjects
     : public base::SupportsWeakPtr<UserServiceObjects> {
  public:
   // Created on the main thread.
@@ skipping 94 matching lines @@
                              leveldb::mojom::LevelDBServiceRequest request) {
   leveldb_service_runner_->PostTask(
       FROM_HERE,
       base::Bind(
           &UserShellClient::LevelDBServiceObjects::OnLevelDBServiceRequest,
           leveldb_objects_->AsWeakPtr(), connection,
           base::Passed(&request)));
 }
 
 }  // namespace user_service