Remove dependency on //content from history DownloadDatabase

chrome/browser/history/download_database.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_HISTORY_DOWNLOAD_DATABASE_H_
-#define CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_
-
-#include <string>
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/threading/platform_thread.h"
-#include "content/public/browser/download_item.h"
-#include "sql/meta_table.h"
-
-namespace sql {
-class Connection;
-}
-
-namespace history {
-
-struct DownloadRow;
-
-// Maintains a table of downloads.
-class DownloadDatabase {
- public:
-  // Must call InitDownloadTable before using any other functions.
-  DownloadDatabase();
-  virtual ~DownloadDatabase();
-
-  uint32 GetNextDownloadId();
-
-  // Get all the downloads from the database.
-  void QueryDownloads(
-      std::vector<DownloadRow>* results);
-
-  // Update the state of one download. Returns true if successful.
-  // Does not update |url|, |start_time|; uses |id| only
-  // to select the row in the database table to update.
-  bool UpdateDownload(const DownloadRow& data);
-
-  // Create a new database entry for one download and return true if the
-  // creation succeeded, false otherwise.
-  bool CreateDownload(const DownloadRow& info);
-
-  // Remove |id| from the database.
-  void RemoveDownload(uint32 id);
-
-  size_t CountDownloads();
-
- protected:
-  // Returns the database for the functions in this interface.
-  virtual sql::Connection& GetDB() = 0;
-
-  // Returns true if able to successfully add mime types to the downloads table.
-  bool MigrateMimeType();
-
-  // Returns true if able to successfully rewrite the invalid values for the
-  // |state| field from 3 to 4. Returns false if there was an error fixing the
-  // database. See http://crbug.com/140687
-  bool MigrateDownloadsState();
-
-  // Returns true if able to successfully add the last interrupt reason and the
-  // two target paths to downloads.
-  bool MigrateDownloadsReasonPathsAndDangerType();
-
-  // Returns true if able to successfully add the referrer column to the
-  // downloads table.
-  bool MigrateReferrer();
-
-  // Returns true if able to successfully add the by_ext_id and by_ext_name
-  // columns to the downloads table.
-  bool MigrateDownloadedByExtension();
-
-  // Returns true if able to successfully add the etag and last-modified columns
-  // to the downloads table.
-  bool MigrateDownloadValidators();
-
-  // Creates the downloads table if needed.
-  bool InitDownloadTable();
-
-  // Used to quickly clear the downloads. First you would drop it, then you
-  // would re-initialize it.
-  bool DropDownloadTable();
-
- private:
-  FRIEND_TEST_ALL_PREFIXES(
-      HistoryBackendDBTest, ConfirmDownloadInProgressCleanup);
-
-  // Values used in the database for DownloadItem::State.
-  static const int kStateInvalid;
-  static const int kStateInProgress;
-  static const int kStateComplete;
-  static const int kStateCancelled;
-  static const int kStateBug140687;
-  static const int kStateInterrupted;
-
-  // Values used in the database for DownloadItem::DangerType
-  static const int kDangerTypeInvalid;
-  static const int kDangerTypeNotDangerous;
-  static const int kDangerTypeDangerousFile;
-  static const int kDangerTypeDangerousUrl;
-  static const int kDangerTypeDangerousContent;
-  static const int kDangerTypeMaybeDangerousContent;
-  static const int kDangerTypeUncommonContent;
-  static const int kDangerTypeUserValidated;
-  static const int kDangerTypeDangerousHost;
-  static const int kDangerTypePotentiallyUnwanted;
-
-  // Fixes state of the download entries. Sometimes entries with IN_PROGRESS
-  // state are not updated during browser shutdown (particularly when crashing).
-  // On the next start such entries are considered interrupted with
-  // interrupt reason |DOWNLOAD_INTERRUPT_REASON_CRASH|.  This function
-  // fixes such entries.
-  void EnsureInProgressEntriesCleanedUp();
-
-  bool EnsureColumnExists(const std::string& name, const std::string& type);
-
-  void RemoveDownloadURLs(uint32 id);
-
-  // Utility functions for conversion between DownloadItem types
-  // and DownloadDatabase constants.
-  static int StateToInt(content::DownloadItem::DownloadState state);
-  static content::DownloadItem::DownloadState IntToState(int state);
-  static int DangerTypeToInt(content::DownloadDangerType danger_type);
-  static content::DownloadDangerType IntToDangerType(int danger_type);
-
-  bool owning_thread_set_;
-  base::PlatformThreadId owning_thread_;
-
-  // Initialized to false on construction, and checked in all functional
-  // routines post-migration in the database for a possible call to
-  // CleanUpInProgressEntries().  This allows us to avoid
-  // doing the cleanup until after any DB migration and unless we are
-  // actually use the downloads database.
-  bool in_progress_entry_cleanup_completed_;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadDatabase);
-};
-
-}  // namespace history
-
-#endif  // CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_