Componentize HistoryDatabase

components/history/core/android/favicon_sql_handler.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 COMPONENTS_HISTORY_CORE_ANDROID_FAVICON_SQL_HANDLER_H_
-#define COMPONENTS_HISTORY_CORE_ANDROID_FAVICON_SQL_HANDLER_H_
-
-#include "components/history/core/android/sql_handler.h"
-
-namespace history {
-
-class ThumbnailDatabase;
-
-// The SQL handler implementation for icon_mapping and favicon table.
-class FaviconSQLHandler : public SQLHandler {
- public:
-  explicit FaviconSQLHandler(ThumbnailDatabase* thumbnail_db);
-  virtual ~FaviconSQLHandler();
-
-  // SQLHandler overrides:
-  virtual bool Update(const HistoryAndBookmarkRow& row,
-                      const TableIDRows& ids_set) override;
-  virtual bool Delete(const TableIDRows& ids_set) override;
-  virtual bool Insert(HistoryAndBookmarkRow* row) override;
-
- private:
-  // Deletes the given favicons if they are not used by any pages. Returns
-  // true if all unused favicons are deleted.
-  bool DeleteUnusedFavicon(const std::vector<favicon_base::FaviconID>& ids);
-
-  ThumbnailDatabase* thumbnail_db_;
-
-  DISALLOW_COPY_AND_ASSIGN(FaviconSQLHandler);
-};
-
-}  // namespace history.
-
-#endif  // COMPONENTS_HISTORY_CORE_ANDROID_FAVICON_SQL_HANDLER_H_