Enable RL sync by default on iOS

components/reading_list/ios/offline_url_utils.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 COMPONENTS_READING_LIST_OFFLINE_URL_UTILS_H_
-#define COMPONENTS_READING_LIST_OFFLINE_URL_UTILS_H_
+#ifndef COMPONENTS_READING_LIST_IOS_OFFLINE_URL_UTILS_H_
+#define COMPONENTS_READING_LIST_IOS_OFFLINE_URL_UTILS_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "url/gurl.h"
 
 namespace reading_list {
 
 // The absolute path of the directory where offline URLs are saved.
 // |profile_path| is the path to the profile directory that contain the offline
@@ skipping 19 matching lines @@
 // The relative path to the offline webpage for the |url|. The result is
 // relative to |OfflineRootDirectoryPath()|.
 // The file may not exist.
 base::FilePath OfflinePagePath(const GURL& url);
 
 // The name of the directory containing offline data for |url|.
 std::string OfflineURLDirectoryID(const GURL& url);
 
 }  // namespace reading_list
 
-#endif  // COMPONENTS_READING_LIST_OFFLINE_URL_UTILS_H_
+#endif  // COMPONENTS_READING_LIST_IOS_OFFLINE_URL_UTILS_H_