Enable RL sync by default on iOS

components/reading_list/ios/offline_url_utils.h

Index: components/reading_list/ios/offline_url_utils.h
diff --git a/components/reading_list/offline_url_utils.h b/components/reading_list/ios/offline_url_utils.h
similarity index 89%
rename from components/reading_list/offline_url_utils.h
rename to components/reading_list/ios/offline_url_utils.h
index e818ac4a8a131ef70de3b40cf93db627f43e3742..45af3d27e91b6d431d68d5eda192ab13b6740471 100644
--- a/components/reading_list/offline_url_utils.h
+++ b/components/reading_list/ios/offline_url_utils.h
@@ -2,8 +2,8 @@
 // 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>
 
@@ -43,4 +43,4 @@ 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_