Changes to add duration into history database.

chrome/browser/history/history.cc

Index: chrome/browser/history/history.cc
diff --git a/chrome/browser/history/history.cc b/chrome/browser/history/history.cc
index 1006640a74f1b092e339073dfeeb8a987e882920..865ae46bf75c43b4b7c78a5e8161dd0190848921 100644
--- a/chrome/browser/history/history.cc
+++ b/chrome/browser/history/history.cc
@@ -385,6 +385,14 @@ void HistoryService::SetPageTitle(const GURL& url,
   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,