Add RemoteFileSyncService interface

chrome/browser/sync_file_system/remote_file_sync_service.cc

+// Copyright (c) 2012 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/remote_file_sync_service.h"
+
+namespace sync_file_system {
+
+RemoteFileSyncService::RemoteFileSyncService() {
+}
+
+RemoteFileSyncService::~RemoteFileSyncService() {
+}
+
+void RemoteFileSyncService::AddObserver(RemoteChangeObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void RemoteFileSyncService::RemoveObserver(RemoteChangeObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void RemoteFileSyncService::NotifyRemoteChangeAvailable(int64 pending_changes) {
+  // TODO(tzik): Implement.
+}
+
+
+}  // namespace sync_file_system