Revert 212459 "Remove TextDatabase from the history service."

trunk/src/chrome/browser/history/history_service.cc

 // 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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
 // -----------                       --------------
 // HistoryService <----------------> HistoryBackend
 //                                   -> HistoryDatabase
 //                                      -> SQLite connection to History
 //                                   -> ArchivedDatabase
 //                                      -> SQLite connection to Archived History
+//                                   -> TextDatabaseManager
+//                                      -> SQLite connection to one month's data
+//                                      -> SQLite connection to one month's data
+//                                      ...
 //                                   -> ThumbnailDatabase
 //                                      -> SQLite connection to Thumbnails
 //                                         (and favicons)
 
 #include "chrome/browser/history/history_service.h"
 
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 559 matching lines @@
          ++i)
       urls.push_back(i->url());
 
     visitedlink_master_->AddURLs(urls);
   }
 
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::AddPagesWithDetails, info, visit_source);
 }
 
+void HistoryService::SetPageContents(const GURL& url,
+                                     const string16& contents) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!CanAddURL(url))
+    return;
+
+  ScheduleAndForget(PRIORITY_LOW, &HistoryBackend::SetPageContents,
+                    url, contents);
+}
+
 HistoryService::Handle HistoryService::GetPageThumbnail(
     const GURL& page_url,
     CancelableRequestConsumerBase* consumer,
     const ThumbnailDataCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return Schedule(PRIORITY_NORMAL, &HistoryBackend::GetPageThumbnail, consumer,
                   new history::GetPageThumbnailRequest(callback), page_url);
 }
 
 CancelableTaskTracker::TaskId HistoryService::GetFavicons(
@@ skipping 668 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   visit_database_observers_.RemoveObserver(observer);
 }
 
 void HistoryService::NotifyVisitDBObserversOnAddVisit(
     const history::BriefVisitInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
   FOR_EACH_OBSERVER(history::VisitDatabaseObserver, visit_database_observers_,
                     OnAddVisit(info));
 }