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

chrome/browser/history/history_service.cc

Index: chrome/browser/history/history_service.cc
diff --git a/chrome/browser/history/history_service.cc b/chrome/browser/history/history_service.cc
index a22ac4b0dc819f9d8a7b3f1b74c90bda1288d316..16e04df67f577ad58eb2027c26877adf1f6c51ee 100644
--- a/chrome/browser/history/history_service.cc
+++ b/chrome/browser/history/history_service.cc
@@ -392,7 +392,7 @@ void HistoryService::SetOnBackendDestroyTask(const base::Closure& task) {
 void HistoryService::AddPage(const GURL& url,
                              Time time,
                              history::ContextID context_id,
-                             int32 page_id,
+                             int nav_entry_id,
                              const GURL& referrer,
                              const history::RedirectList& redirects,
                              ui::PageTransition transition,
@@ -400,7 +400,7 @@ void HistoryService::AddPage(const GURL& url,
                              bool did_replace_entry) {
   DCHECK(thread_checker_.CalledOnValidThread());
   AddPage(
-      history::HistoryAddPageArgs(url, time, context_id, page_id, referrer,
+      history::HistoryAddPageArgs(url, time, context_id, nav_entry_id, referrer,
                                   redirects, transition, visit_source,
                                   did_replace_entry));
 }
@@ -465,13 +465,13 @@ void HistoryService::SetPageTitle(const GURL& url,
 }
 
 void HistoryService::UpdateWithPageEndTime(history::ContextID context_id,
-                                           int32 page_id,
+                                           int nav_entry_id,
                                            const GURL& url,
                                            Time end_ts) {
   DCHECK(thread_) << "History service being called after cleanup";
   DCHECK(thread_checker_.CalledOnValidThread());
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::UpdateWithPageEndTime,
-                    context_id, page_id, url, end_ts);
+                    context_id, nav_entry_id, url, end_ts);
 }
 
 void HistoryService::AddPageWithDetails(const GURL& url,