Enable RL sync by default on iOS

ios/chrome/browser/reading_list/url_downloader.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 "ios/chrome/browser/reading_list/url_downloader.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
-#include "components/reading_list/offline_url_utils.h"
+#include "components/reading_list/ios/offline_url_utils.h"
 #include "ios/chrome/browser/chrome_paths.h"
 #include "ios/chrome/browser/dom_distiller/distiller_viewer.h"
 #include "ios/web/public/web_thread.h"
 #include "net/base/escape.h"
 #include "url/gurl.h"
 
 // URLDownloader
 
 URLDownloader::URLDownloader(
     dom_distiller::DomDistillerService* distiller_service,
@@ skipping 199 matching lines @@
 }
 
 bool URLDownloader::SaveHTMLForURL(std::string html, const GURL& url) {
   if (html.empty()) {
     return false;
   }
   base::FilePath path =
       reading_list::OfflinePageAbsolutePath(base_directory_, url);
   return base::WriteFile(path, html.c_str(), html.length()) > 0;
 }