Changes to add duration into history database.

chrome/browser/history/history.h

Index: chrome/browser/history/history.h
diff --git a/chrome/browser/history/history.h b/chrome/browser/history/history.h
index 230eb4f419eb81ee26c3aff0a032fd58420561f3..26d673d52daf5574b25b6c911a0dd82ed8b8ee8e 100644
--- a/chrome/browser/history/history.h
+++ b/chrome/browser/history/history.h
@@ -220,6 +220,11 @@ class HistoryService : public CancelableRequestProvider,
   // title in the full text index.
   void SetPageTitle(const GURL& url, const string16& title);
 
+  void UpdatePageInfo(const void* host,

[GeorgeY, 2012/03/22 00:36:49]

Add comments, please,

and why do you use void* here? if it's a host string it should be const
std::string&, if it's an url it should be const GURL&

[Wei Li, 2012/03/22 20:05:38]

Done.

+                      int32 page_id,
+                      const GURL& url,
+                      const base::Time ts);
+
   // Indexing ------------------------------------------------------------------
 
   // Notifies history of the body text of the given recently-visited URL.