[SyncFS] Add RemoteToLocalSyncer skeleton

chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.h"
 
 #include "base/callback.h"
 #include "base/logging.h"
 
 namespace sync_file_system {
 namespace drive_backend {
 
-LocalToRemoteSyncer::LocalToRemoteSyncer() {
+LocalToRemoteSyncer::LocalToRemoteSyncer(SyncEngineContext* sync_context)
+    : sync_context_(sync_context),
+      weak_ptr_factory_(this) {
   NOTIMPLEMENTED();
 }
 
 LocalToRemoteSyncer::~LocalToRemoteSyncer() {
   NOTIMPLEMENTED();
 }
 
 void LocalToRemoteSyncer::Run(const SyncStatusCallback& callback) {
   NOTIMPLEMENTED();
   callback.Run(SYNC_STATUS_FAILED);
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system