Switch the history backend from using page ids to navigation entry unique ids.

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>
@@ skipping 175 matching lines @@
 
   void ClearCachedDataForContextID(ContextID context_id);
 
   // Navigation ----------------------------------------------------------------
 
   // |request.time| must be unique with high probability.
   void AddPage(const HistoryAddPageArgs& request);
   virtual void SetPageTitle(const GURL& url, const base::string16& title);
   void AddPageNoVisitForBookmark(const GURL& url, const base::string16& title);
   void UpdateWithPageEndTime(ContextID context_id,
-                             int32 page_id,
+                             int nav_entry_id,
                              const GURL& url,
                              base::Time end_ts);
 
   // Querying ------------------------------------------------------------------
 
   // Run the |callback| on the History thread.
   // history_url_provider.h has the temporal ordering for
   // the call sequence.
   // |callback| should handle the NULL database case.
   void ScheduleAutocomplete(const base::Callback<
@@ skipping 703 matching lines @@
 
   // List of observers
   ObserverList<HistoryBackendObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_BACKEND_H_