Move c/b/webdata/ code to components/webdata/

chrome/browser/webdata/web_database_service.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.
-
-// Chromium settings and storage represent user-selected preferences and
-// information and MUST not be extracted, overwritten or modified except
-// through Chromium defined APIs.
-
-#ifndef CHROME_BROWSER_WEBDATA_WEB_DATABASE_SERVICE_H_
-#define CHROME_BROWSER_WEBDATA_WEB_DATABASE_SERVICE_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/scoped_ptr.h"
-#include "chrome/browser/api/webdata/web_data_service_base.h"
-#include "chrome/browser/webdata/web_database.h"
-
-class WebDataServiceBackend;
-class WebDataRequestManager;
-
-namespace content {
-class BrowserContext;
-}
-
-namespace tracked_objects {
-class Location;
-}
-
-class WDTypedResult;
-class WebDataServiceConsumer;
-
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// WebDatabaseService defines the interface to a generic data repository
-// responsible for controlling access to the web database (metadata associated
-// with web pages).
-//
-////////////////////////////////////////////////////////////////////////////////
-
-class WebDatabaseService
-    : public base::RefCountedThreadSafe<
-          WebDatabaseService,
-          content::BrowserThread::DeleteOnUIThread> {
- public:
-  typedef base::Callback<scoped_ptr<WDTypedResult>(WebDatabase*)> ReadTask;
-  typedef base::Callback<WebDatabase::State(WebDatabase*)> WriteTask;
-  typedef base::Callback<void(sql::InitStatus)> InitCallback;
-
-  // Takes the path to the WebDatabase file.
-  explicit WebDatabaseService(const base::FilePath& path);
-
-  // Adds |table| as a WebDatabaseTable that will participate in
-  // managing the database, transferring ownership. All calls to this
-  // method must be made before |LoadDatabase| is called.
-  virtual void AddTable(scoped_ptr<WebDatabaseTable> table);
-
-  // Initializes the web database service. Takes a callback which will return
-  // the status of the DB after the init.
-  virtual void LoadDatabase(const InitCallback& callback);
-
-  // Unloads the database without actually shutting down the service.  This can
-  // be used to temporarily reduce the browser process' memory footprint.
-  virtual void UnloadDatabase();
-
-  // Unloads database and will not reload.
-  virtual void ShutdownDatabase();
-
-  // Gets a ptr to the WebDatabase (owned by WebDatabaseService).
-  // TODO(caitkp): remove this method once SyncServices no longer depend on it.
-  virtual WebDatabase* GetDatabaseOnDB() const;
-
-  // Schedule an update/write task on the DB thread.
-  virtual void ScheduleDBTask(
-      const tracked_objects::Location& from_here,
-      const WriteTask& task);
-
-  // Schedule a read task on the DB thread.
-  virtual WebDataServiceBase::Handle ScheduleDBTaskWithResult(
-      const tracked_objects::Location& from_here,
-      const ReadTask& task,
-      WebDataServiceConsumer* consumer);
-
-  // Cancel an existing request for a task on the DB thread.
-  // TODO(caitkp): Think about moving the definition of the Handle type to
-  // somewhere else.
-  virtual void CancelRequest(WebDataServiceBase::Handle h);
-
- private:
-  friend struct content::BrowserThread::DeleteOnThread<
-      content::BrowserThread::UI>;
-  friend class base::DeleteHelper<WebDatabaseService>;
-
-  virtual ~WebDatabaseService();
-
-  base::FilePath path_;
-
-  // The primary owner is |WebDatabaseService| but is refcounted because
-  // PostTask on DB thread may outlive us.
-  scoped_refptr<WebDataServiceBackend> wds_backend_;
-};
-
-#endif  // CHROME_BROWSER_WEBDATA_WEB_DATABASE_SERVICE_H_