Move bookmarks' production code to components/bookmarks

chrome/browser/bookmarks/bookmark_expanded_state_tracker.h

-// Copyright (c) 2012 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 CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
-#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_
-
-#include <set>
-
-#include "components/bookmarks/core/browser/base_bookmark_model_observer.h"
-
-class BookmarkModel;
-class BookmarkNode;
-class PrefService;
-
-// BookmarkExpandedStateTracker is used to track a set of expanded nodes. The
-// nodes are persisted in preferences. If an expanded node is removed from the
-// model BookmarkExpandedStateTracker removes the node.
-class BookmarkExpandedStateTracker : public BaseBookmarkModelObserver {
- public:
-  typedef std::set<const BookmarkNode*> Nodes;
-
-  BookmarkExpandedStateTracker(BookmarkModel* bookmark_model,
-                               PrefService* pref_service);
-  virtual ~BookmarkExpandedStateTracker();
-
-  // The set of expanded nodes.
-  void SetExpandedNodes(const Nodes& nodes);
-  Nodes GetExpandedNodes();
-
- private:
-  // BaseBookmarkModelObserver:
-  virtual void BookmarkModelLoaded(BookmarkModel* model,
-                                   bool ids_reassigned) OVERRIDE;
-  virtual void BookmarkModelChanged() OVERRIDE;
-  virtual void BookmarkModelBeingDeleted(BookmarkModel* model) OVERRIDE;
-  virtual void BookmarkNodeRemoved(BookmarkModel* model,
-                                   const BookmarkNode* parent,
-                                   int old_index,
-                                   const BookmarkNode* node) OVERRIDE;
-  virtual void BookmarkAllNodesRemoved(BookmarkModel* model) OVERRIDE;
-
-  // Updates the value for |prefs::kBookmarkEditorExpandedNodes| from
-  // GetExpandedNodes().
-  void UpdatePrefs(const Nodes& nodes);
-
-  BookmarkModel* bookmark_model_;
-  PrefService* pref_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(BookmarkExpandedStateTracker);
-};
-
-#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EXPANDED_STATE_TRACKER_H_