Enable RL sync by default on iOS

ios/chrome/browser/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/features.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 declare_args() {
   google_test_gaia_client_id = ""
   google_test_gaia_client_secret = ""
@@ skipping 70 matching lines @@
     "//components/keyed_service/core",
     "//components/keyed_service/ios",
     "//components/metrics",
     "//components/metrics_services_manager",
     "//components/net_log",
     "//components/network_session_configurator",
     "//components/ntp_tiles",
     "//components/pref_registry",
     "//components/prefs",
     "//components/proxy_config",
-    "//components/reading_list",
+    "//components/reading_list/core",
+    "//components/reading_list/ios",
     "//components/search_engines",
     "//components/signin/core/browser",
     "//components/ssl_config",
     "//components/translate/core/browser",
     "//components/url_formatter",
     "//components/variations",
     "//components/variations/service",
     "//components/version_info",
     "//components/webdata_services",
     "//ios/chrome/browser/browser_state",
@@ skipping 85 matching lines @@
   ]
 
   deps = [
     ":browser",
     "//base",
     "//components/autofill/core/common",
     "//components/dom_distiller/core",
     "//components/flags_ui",
     "//components/flags_ui:switches",
     "//components/ntp_tiles",
-    "//components/reading_list",
+    "//components/reading_list/core",
     "//components/strings",
     "//components/sync",
     "//components/variations",
     "//google_apis",
     "//ios/chrome/app/strings",
     "//ios/web",
     "//ios/web:user_agent",
   ]
 
   defines = [
@@ skipping 27 matching lines @@
     "//components/proxy_config",
     "//components/ssl_config",
     "//components/variations",
     "//ios/web:test_support",
     "//net",
     "//net:test_support",
     "//testing/gtest",
     "//url",
   ]
 }