Eliminate the archived history database and clean up related code.

chrome/browser/history/history_backend.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_HISTORY_BACKEND_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_BACKEND_H_
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/containers/mru_cache.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/memory_pressure_listener.h"
 #include "base/memory/scoped_ptr.h"
-#include "chrome/browser/history/archived_database.h"
 #include "chrome/browser/history/expire_history_backend.h"
 #include "chrome/browser/history/history_database.h"
 #include "chrome/browser/history/history_marshaling.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/history/thumbnail_database.h"
 #include "chrome/browser/history/visit_tracker.h"
 #include "chrome/browser/search_engines/template_url_id.h"
 #include "sql/init_status.h"
 #include "ui/base/layout.h"
 
@@ skipping 568 matching lines @@
   // Update the visit_duration information in visits table.
   void UpdateVisitDuration(VisitID visit_id, const base::Time end_ts);
 
   // Querying ------------------------------------------------------------------
 
   // Backends for QueryHistory. *Basic() handles queries that are not
   // text search queries and can just be given directly to the history DB.
   // The *Text() version performs a brute force query of the history DB to
   // search for results which match the given text query.
   // Both functions assume QueryHistory already checked the DB for validity.
-  void QueryHistoryBasic(URLDatabase* url_db, VisitDatabase* visit_db,
-                         const QueryOptions& options, QueryResults* result);
-  void QueryHistoryText(URLDatabase* url_db,
-                        VisitDatabase* visit_db,
-                        const base::string16& text_query,
+  void QueryHistoryBasic(const QueryOptions& options, QueryResults* result);
+  void QueryHistoryText(const base::string16& text_query,
                         const QueryOptions& options,
                         QueryResults* result);
 
   // Committing ----------------------------------------------------------------
 
   // We always keep a transaction open on the history database so that multiple
   // transactions can be batched. Periodically, these are flushed (use
   // ScheduleCommit). This function does the commit to write any new changes to
   // disk and opens a new transaction. This will be called automatically by
   // ScheduleCommit, or it can be called explicitly if a caller really wants
@@ skipping 137 matching lines @@
 
   // Release all tasks in history_db_tasks_ and clears it.
   void ReleaseDBTasks();
 
   // Schedules a broadcast of the given notification on the main thread.
   virtual void BroadcastNotifications(
       int type,
       scoped_ptr<HistoryDetails> details) OVERRIDE;
 
   virtual void NotifySyncURLsDeleted(bool all_history,
-                                     bool archived,
+                                     bool expired,
                                      URLRows* rows) OVERRIDE;
 
   // Deleting all history ------------------------------------------------------
 
   // Deletes all history. This is a special case of deleting that is separated
   // from our normal dependency-following method for performance reasons. The
   // logic lives here instead of ExpireHistoryBackend since it will cause
-  // re-initialization of some databases such as Thumbnails or Archived that
-  // could fail. When these databases are not valid, our pointers must be NULL,
-  // so we need to handle this type of operation to keep the pointers in sync.
+  // re-initialization of some databases (e.g. Thumbnails) that could fail.
+  // When these databases are not valid, our pointers must be NULL, so we need
+  // to handle this type of operation to keep the pointers in sync.
   void DeleteAllHistory();
 
   // Given a vector of all URLs that we will keep, removes all thumbnails
   // referenced by any URL, and also all favicons that aren't used by those
   // URLs.
   bool ClearAllThumbnailHistory(const URLRows& kept_urls);
 
   // Deletes all information in the history database, except for the supplied
   // set of URLs in the URL table (these should correspond to the bookmarked
   // URLs).
@@ skipping 22 matching lines @@
   base::FilePath history_dir_;
 
   // The history/thumbnail databases. Either MAY BE NULL if the database could
   // not be opened, all users must first check for NULL and return immediately
   // if it is. The thumbnail DB may be NULL when the history one isn't, but not
   // vice-versa.
   scoped_ptr<HistoryDatabase> db_;
   bool scheduled_kill_db_;  // Database is being killed due to error.
   scoped_ptr<ThumbnailDatabase> thumbnail_db_;
 
-  // Stores old history in a larger, slower database.
-  scoped_ptr<ArchivedDatabase> archived_db_;
-
   // Manages expiration between the various databases.
   ExpireHistoryBackend expirer_;
 
   // A commit has been scheduled to occur sometime in the future. We can check
   // non-null-ness to see if there is a commit scheduled in the future, and we
   // can use the pointer to cancel the scheduled commit. There can be only one
   // scheduled commit at a time (see ScheduleCommit).
   scoped_refptr<CommitLaterTask> scheduled_commit_;
 
   // Maps recent redirect destination pages to the chain of redirects that
@@ skipping 50 matching lines @@
 
   // Listens for the system being under memory pressure.
   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_BACKEND_H_