Move ReadingList model to components/reading_list/core

components/reading_list/core/reading_list_model.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/ios/reading_list_model.h"
+#include "components/reading_list/core/reading_list_model.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 
 ReadingListModel::ReadingListModel() : current_batch_updates_count_(0) {}
 
 ReadingListModel::~ReadingListModel() {
   for (auto& observer : observers_) {
     observer.ReadingListModelBeingDeleted(this);
   }
@@ skipping 56 matching lines @@
 void ReadingListModel::LeavingBatchUpdates() {
   DCHECK(CalledOnValidThread());
   for (auto& observer : observers_)
     observer.ReadingListModelCompletedBatchUpdates(this);
 }
 
 ReadingListModel::ScopedReadingListBatchUpdate::
     ~ScopedReadingListBatchUpdate() {
   model_->EndBatchUpdates();
 }