Discard unused AppListPrefs code.

chrome/browser/ui/app_list/app_list_prefs.h

-// Copyright 2014 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_UI_APP_LIST_APP_LIST_PREFS_H_
-#define CHROME_BROWSER_UI_APP_LIST_APP_LIST_PREFS_H_
-
-#include <memory>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/observer_list.h"
-#include "base/values.h"
-#include "components/keyed_service/core/keyed_service.h"
-#include "components/sync/model/string_ordinal.h"
-
-class PrefService;
-
-namespace content {
-class BrowserContext;
-}
-
-namespace user_prefs {
-class PrefRegistrySyncable;
-}
-
-namespace app_list {
-
-class AppListPrefs : public KeyedService {
- public:
-  // An app list item's information. This is enough data to reconstruct the full
-  // hierarchy and ordering information of the app list.
-  struct AppListInfo {
-    enum ItemType {
-      ITEM_TYPE_INVALID = 0,
-      ITEM_TYPE_BEGIN,
-      APP_ITEM = ITEM_TYPE_BEGIN,
-      FOLDER_ITEM,
-
-      // Do not change the order of this enum.
-      // When adding values, remember to update ITEM_TYPE_END.
-      ITEM_TYPE_END = FOLDER_ITEM,
-    };
-    AppListInfo();
-    AppListInfo(const AppListInfo& other);
-    ~AppListInfo();
-    std::unique_ptr<base::DictionaryValue> CreateDictFromAppListInfo() const;
-
-    static std::unique_ptr<AppListPrefs::AppListInfo> CreateAppListInfoFromDict(
-        const base::DictionaryValue* item_dict);
-
-    // The id of the folder containing this item.
-    std::string parent_id;
-
-    // The name of this item.
-    std::string name;
-
-    // The position of this item in the app list.
-    syncer::StringOrdinal position;
-
-    // The type of app list item being represented.
-    ItemType item_type;
-  };
-
-  typedef std::map<std::string, AppListInfo> AppListInfoMap;
-
-  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
-
-  static AppListPrefs* Get(content::BrowserContext* context);
-
-  static AppListPrefs* Create(PrefService* pref_service);
-
-  ~AppListPrefs() override;
-
-  // Sets the app list info for |id|.
-  void SetAppListInfo(const std::string& id, const AppListInfo& info);
-
-  // Gets the app list info for |id|.
-  std::unique_ptr<AppListInfo> GetAppListInfo(const std::string& id) const;
-
-  // Gets a map of all AppListInfo objects in the prefs.
-  void GetAllAppListInfos(AppListInfoMap* out) const;
-
-  // Deletes the app list info for |id|.
-  void DeleteAppListInfo(const std::string& id);
-
- private:
-  explicit AppListPrefs(PrefService* pref_service);
-
-  PrefService* pref_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppListPrefs);
-};
-
-}  // namespace app_list
-
-#endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_PREFS_H_