Fix Acid3 Test 48: LINKTEST, Chromium side....

chrome/browser/history/history_database.h

Index: chrome/browser/history/history_database.h
===================================================================
--- chrome/browser/history/history_database.h	(revision 19822)
+++ chrome/browser/history/history_database.h	(working copy)
@@ -121,6 +121,12 @@
   // visit id wasn't found.
   SegmentID GetSegmentID(VisitID visit_id);
 
+  // Retrieves/Updates early expiration threshold, which specifies the earliest
+  // known point in history that may possibly to contain visits suitable for
+  // early expiration (AUTO_SUBFRAMES).
+  virtual base::Time GetEarlyExpirationThreshold();
+  virtual void UpdateEarlyExpirationThreshold(base::Time threshold);
+
   // Drops the starred table and star_id from urls.
   bool MigrateFromVersion15ToVersion16();
 
@@ -156,6 +162,7 @@
   SqliteStatementCache* statement_cache_;
 
   MetaTableHelper meta_table_;
+  base::Time cached_early_expiration_threshold_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryDatabase);
 };