Move ReadingList model to components/reading_list/core

components/reading_list/ios/reading_list_model_observer.h

-// 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.
-
-#ifndef COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
-#define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
-
-#include <set>
-#include <vector>
-
-#include "components/reading_list/ios/reading_list_entry.h"
-
-class GURL;
-class ReadingListModel;
-
-// Observer for the Reading List model. In the observer methods care should be
-// taken to not modify the model.
-class ReadingListModelObserver {
- public:
-  // Invoked when the model has finished loading. Until this method is called it
-  // is unsafe to use the model.
-  virtual void ReadingListModelLoaded(const ReadingListModel* model) = 0;
-
-  // Invoked when the batch updates are about to start. It will only be called
-  // once before ReadingListModelCompletedBatchUpdates, even if several updates
-  // are taking place at the same time.
-  virtual void ReadingListModelBeganBatchUpdates(
-      const ReadingListModel* model) {}
-
-  // Invoked when the batch updates have completed. This is called once all
-  // batch updates are completed.
-  virtual void ReadingListModelCompletedBatchUpdates(
-      const ReadingListModel* model) {}
-
-  // Invoked from the destructor of the model. The model is no longer valid
-  // after this call. There is no need to call RemoveObserver on the model from
-  // here, as the observers are automatically deleted.
-  virtual void ReadingListModelBeingDeleted(const ReadingListModel* model) {}
-
-  // Invoked when elements are about to be removed from the read or unread list.
-  virtual void ReadingListWillRemoveEntry(const ReadingListModel* model,
-                                          const GURL& url) {}
-  // Invoked when elements |MarkEntryUpdated| is called on an entry. This means
-  // that the order of the entry may change and read/unread list may change
-  // too.
-  virtual void ReadingListWillMoveEntry(const ReadingListModel* model,
-                                        const GURL& url) {}
-
-  // Invoked when elements |MarkEntryUpdated| has been called on an entry. This
-  // means that the order of the entry may have changed and read/unread list may
-  // have changed too.
-  virtual void ReadingListDidMoveEntry(const ReadingListModel* model,
-                                       const GURL& url) {}
-
-  // Invoked when elements are added.
-  virtual void ReadingListWillAddEntry(const ReadingListModel* model,
-                                       const ReadingListEntry& entry) {}
-
-  // Invoked when elements have been added. This method is called after the
-  // the entry has been added to the model and the entry can now be retrieved
-  // from the model.
-  // |source| says where the entry came from.
-  virtual void ReadingListDidAddEntry(const ReadingListModel* model,
-                                      const GURL& url,
-                                      reading_list::EntrySource source) {}
-
-  // Invoked when an entry is about to change.
-  virtual void ReadingListWillUpdateEntry(const ReadingListModel* model,
-                                          const GURL& url) {}
-
-  // Called after all the changes signaled by calls to the "Will" methods are
-  // done. All the "Will" methods are called as necessary, then the changes
-  // are applied and then this method is called.
-  virtual void ReadingListDidApplyChanges(ReadingListModel* model) {}
-
- protected:
-  ReadingListModelObserver() {}
-  virtual ~ReadingListModelObserver() {}
-
-  DISALLOW_COPY_AND_ASSIGN(ReadingListModelObserver);
-};
-
-#endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_