Enable RL sync by default on iOS

components/reading_list/ios/reading_list_model_impl.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 "components/reading_list/reading_list_model_impl.h"
+#include "components/reading_list/ios/reading_list_model_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "components/prefs/pref_service.h"
-#include "components/reading_list/reading_list_model_storage.h"
-#include "components/reading_list/reading_list_pref_names.h"
+#include "components/reading_list/ios/reading_list_model_storage.h"
+#include "components/reading_list/ios/reading_list_pref_names.h"
 #include "url/gurl.h"
 
 ReadingListModelImpl::ReadingListModelImpl()
     : ReadingListModelImpl(nullptr, nullptr) {}
 
 ReadingListModelImpl::ReadingListModelImpl(
     std::unique_ptr<ReadingListModelStorage> storage,
     PrefService* pref_service)
     : pref_service_(pref_service),
       has_unseen_(false),
@@ skipping 483 matching lines @@
   DCHECK(loaded());
   std::sort(read_->begin(), read_->end(),
             ReadingListEntry::CompareEntryUpdateTime);
   std::sort(unread_->begin(), unread_->end(),
             ReadingListEntry::CompareEntryUpdateTime);
 }
 
 ReadingListModelStorage* ReadingListModelImpl::StorageLayer() {
   return storage_layer_.get();
 }