Rename WebDataServiceBackend to WebDatabaseBackend

components/webdata/common/web_data_service_backend.h

-// Copyright 2013 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_WEBDATA_COMMON_WEB_DATA_SERVICE_BACKEND_H_
-#define COMPONENTS_WEBDATA_COMMON_WEB_DATA_SERVICE_BACKEND_H_
-
-#include "base/basictypes.h"
-#include "base/callback_forward.h"
-#include "base/compiler_specific.h"
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/ref_counted_delete_on_message_loop.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "components/webdata/common/web_database_service.h"
-#include "components/webdata/common/webdata_export.h"
-
-class WebDatabase;
-class WebDatabaseTable;
-class WebDataRequest;
-class WebDataRequestManager;
-
-namespace tracked_objects {
-class Location;
-}
-
-// WebDataServiceBackend handles all database tasks posted by
-// WebDatabaseService. It is refcounted to allow asynchronous destruction on the
-// DB thread.
-
-// TODO(caitkp): Rename this class to WebDatabaseBackend.
-
-class WEBDATA_EXPORT WebDataServiceBackend
-    : public base::RefCountedDeleteOnMessageLoop<WebDataServiceBackend> {
- public:
-  class Delegate {
-   public:
-    virtual ~Delegate() {}
-
-    // Invoked when the backend has finished loading the db.
-    virtual void DBLoaded(sql::InitStatus status) = 0;
-  };
-
-  WebDataServiceBackend(const base::FilePath& path,
-                        Delegate* delegate,
-                        const scoped_refptr<base::MessageLoopProxy>& db_thread);
-
-  // Must call only before InitDatabaseWithCallback.
-  void AddTable(scoped_ptr<WebDatabaseTable> table);
-
-  // Initializes the database and notifies caller via callback when complete.
-  // Callback is called synchronously.
-  void InitDatabase();
-
-  // Opens the database file from the profile path if an init has not yet been
-  // attempted. Separated from the constructor to ease construction/destruction
-  // of this object on one thread but database access on the DB thread. Returns
-  // the status of the database.
-  sql::InitStatus LoadDatabaseIfNecessary();
-
-  // Shuts down the database.
-  void ShutdownDatabase();
-
-  // Task wrappers to update requests and and notify |request_manager_|. These
-  // are used in cases where the request is being made from the UI thread and an
-  // asyncronous callback is required to notify the client of |request|'s
-  // completion.
-  void DBWriteTaskWrapper(
-      const WebDatabaseService::WriteTask& task,
-      scoped_ptr<WebDataRequest> request);
-  void DBReadTaskWrapper(
-      const WebDatabaseService::ReadTask& task,
-      scoped_ptr<WebDataRequest> request);
-
-  // Task runners to run database tasks.
-  void ExecuteWriteTask(const WebDatabaseService::WriteTask& task);
-  scoped_ptr<WDTypedResult> ExecuteReadTask(
-      const WebDatabaseService::ReadTask& task);
-
-  const scoped_refptr<WebDataRequestManager>& request_manager() {
-    return request_manager_;
-  }
-
-  WebDatabase* database() { return db_.get(); }
-
- protected:
-  friend class base::RefCountedDeleteOnMessageLoop<WebDataServiceBackend>;
-  friend class base::DeleteHelper<WebDataServiceBackend>;
-
-  virtual ~WebDataServiceBackend();
-
- private:
-  // Commit the current transaction.
-  void Commit();
-
-  // Path to database file.
-  base::FilePath db_path_;
-
-  // The tables that participate in managing the database. These are
-  // owned here but other than that this class does nothing with
-  // them. Their initialization is in whatever factory creates
-  // WebDatabaseService, and lookup by type is provided by the
-  // WebDatabase class. The tables need to be owned by this refcounted
-  // object, or they themselves would need to be refcounted. Owning
-  // them here rather than having WebDatabase own them makes for
-  // easier unit testing of WebDatabase.
-  ScopedVector<WebDatabaseTable> tables_;
-
-  scoped_ptr<WebDatabase> db_;
-
-  // Keeps track of all pending requests made to the db.
-  scoped_refptr<WebDataRequestManager> request_manager_;
-
-  // State of database initialization. Used to prevent the executing of tasks
-  // before the db is ready.
-  sql::InitStatus init_status_;
-
-  // True if an attempt has been made to load the database (even if the attempt
-  // fails), used to avoid continually trying to reinit if the db init fails.
-  bool init_complete_;
-
-  // Delegate. See the class definition above for more information.
-  scoped_ptr<Delegate> delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebDataServiceBackend);
-};
-
-#endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATA_SERVICE_BACKEND_H_