Changes to add duration into history database.

chrome/browser/history/history.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
@@ skipping 367 matching lines @@
 
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::AddPageNoVisitForBookmark, url);
 }
 
 void HistoryService::SetPageTitle(const GURL& url,
                                   const string16& title) {
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::SetPageTitle, url, title);
 }
 
+void HistoryService::UpdatePageInfo(const void* host,
+                                    int32 page_id,
+                                    const GURL& url,
+                                    const Time end_ts) {
+  ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::UpdatePageInfo,
+                    host, page_id, url, end_ts);
+}
+
 void HistoryService::AddPageWithDetails(const GURL& url,
                                         const string16& title,
                                         int visit_count,
                                         int typed_count,
                                         Time last_visit,
                                         bool hidden,
                                         history::VisitSource visit_source) {
   // Filter out unwanted URLs.
   if (!CanAddURL(url))
     return;
@@ skipping 473 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }